diff --git a/CMakeLists.txt b/CMakeLists.txt
index f069b95..e0803db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -167,13 +167,20 @@ set(EHS_SOURCES
         include/ehs/io/Usb_LNX.h
         src/io/Usb_LNX.cpp
         include/ehs/db/DbType.h
-        src/db/DbType.cpp
         include/ehs/db/DbTable.h
         include/ehs/db/DbObject.h
         include/ehs/db/DbVar.h
         src/db/DbVar.cpp
         include/ehs/db/Database.h
         src/db/DbObject.cpp
+        src/db/Database.cpp
+        src/db/Database.cpp
+        src/db/DbTable.cpp
+        include/ehs/io/BaseDirectory.h
+        src/io/BaseDirectory.cpp
+        include/ehs/io/Directory_LNX.h
+        src/io/Directory_LNX.cpp
+        include/ehs/io/Directory.h
 )
 
 if (IS_OS_WINDOWS)
diff --git a/include/ehs/Serializer.h b/include/ehs/Serializer.h
index 8b08255..85305ba 100644
--- a/include/ehs/Serializer.h
+++ b/include/ehs/Serializer.h
@@ -1044,7 +1044,10 @@ namespace ehs
         void ReadArray(T* const value, O* const size)
         {
             if (!*size)
-                *size = (O)Read<N>();
+            {
+	            *size = (O)Read<N>();
+            	return;
+            }
 
             for (N i = 0; i < *size; ++i)
                 value[i] = Read<T>();
diff --git a/include/ehs/db/Database.h b/include/ehs/db/Database.h
index 3e1958c..dd60199 100644
--- a/include/ehs/db/Database.h
+++ b/include/ehs/db/Database.h
@@ -10,27 +10,44 @@ namespace ehs
 	private:
 		UInt_64 hashId;
 		Str_8 id;
+		Version version;
 		Array<DbTable> tables;
 
 	public:
 		Database();
 
+		Database(Str_8 id, const Version& version);
+
 		Database(const Str_8& filePath);
 
+		Database(Database&& db) noexcept;
+
+		Database(const Database& db);
+
+		Database& operator=(Database&& db) noexcept;
+
+		Database& operator=(const Database& db);
+
 		UInt_64 GetHashId() const;
 
+		void SetId(Str_8 newId);
+
 		Str_8 GetId() const;
 
+		void SetVersion(const Version& newVersion);
+
+		Version GetVersion() const;
+
 		bool HasTable(UInt_64 hashId) const;
 
-		bool HasTable(Str_8& id) const;
+		bool HasTable(const Str_8& id) const;
 
-		bool CreateTable(Str_8 id);
+		DbTable* CreateTable(Str_8 id);
 
 		DbTable* GetTable(UInt_64 hashId) const;
 
-		DbTable* GetTable(Str_8& id) const;
+		DbTable* GetTable(const Str_8& id) const;
 
-		void Save();
+		void Save(const Str_8& directory) const;
 	};
 }
\ No newline at end of file
diff --git a/include/ehs/db/DbObject.h b/include/ehs/db/DbObject.h
index 5d0c84a..2a52825 100644
--- a/include/ehs/db/DbObject.h
+++ b/include/ehs/db/DbObject.h
@@ -11,15 +11,17 @@ namespace ehs
 	{
 	private:
 		friend class DbTable;
+		friend class DbVar;
 
 		UInt_64 id;
-		Array<DbVar> vars;
-		bool loaded;
 		DbTable* parent;
+		Array<DbVar> vars;
 
 	public:
 		DbObject();
 
+		DbObject(UInt_64 id);
+
 		DbObject(DbObject&& obj) noexcept;
 
 		DbObject(const DbObject& obj);
@@ -28,13 +30,13 @@ namespace ehs
 
 		DbObject& operator=(const DbObject& obj);
 
-		UInt_64 GetId();
+		UInt_64 GetId() const;
 
-		bool HasVariable(UInt_64 hashId);
+		bool HasVariable(UInt_64 hashId) const;
 
 		DbVar* GetVariable(UInt_64 hashId) const;
 
-		void Save();
+		void Save() const;
 
 		void Load();
 
@@ -42,6 +44,7 @@ namespace ehs
 
 		void Free();
 
-		DbTable* GetParent() const;
+	private:
+		void CreateVariable(DbVarTmpl* master);
 	};
 }
\ No newline at end of file
diff --git a/include/ehs/db/DbTable.h b/include/ehs/db/DbTable.h
index e5696af..5a436f2 100644
--- a/include/ehs/db/DbTable.h
+++ b/include/ehs/db/DbTable.h
@@ -4,33 +4,55 @@
 #include "ehs/Array.h"
 #include "DbVarTmpl.h"
 #include "DbObject.h"
+#include "ehs/Serializer.h"
 
 namespace ehs
 {
 	class DbTable
 	{
 	private:
+		friend class Database;
+		friend class DbVar;
+
 		UInt_64 hashId;
 		Str_8 id;
-		Version version;
 		Array<DbVarTmpl> varTmpls;
 		Array<DbObject> objects;
 
 	public:
 		DbTable();
 
-		DbTable();
+		DbTable(Str_8 id);
+
+		DbTable(DbTable&& table) noexcept;
+
+		DbTable(const DbTable& table);
+
+		DbTable& operator=(DbTable&& table) noexcept;
+
+		DbTable& operator=(const DbTable& table);
 
 		UInt_64 GetHashId() const;
 
+		void SetId(Str_8 newId);
+
 		Str_8 GetId() const;
 
-		Version GetVersion() const;
+		bool HasVariable(UInt_64 hashId) const;
 
-		bool CreateVariable(Str_8 id, DbType type);
+		bool HasVariable(const Str_8& id) const;
 
-		bool CreateVariable(Str_8 id, DbType type, UInt_64 size);
+		bool CreateVariable(Str_8 id, DbType type, const Byte* defaultValue);
 
-		void Save();
+		bool CreateVariable(Str_8 id, DbType type, UInt_64 size, const Byte* defaultValue);
+
+		DbObject *CreateObject();
+
+	private:
+		DbVarTmpl* GetVariableTemplate(UInt_64 hashId) const;
+
+		void Serialize(Serializer<UInt_64>& data) const;
+
+		void Deserialize(Serializer<UInt_64>& data);
 	};
 }
diff --git a/include/ehs/db/DbType.h b/include/ehs/db/DbType.h
index 76096cd..e871b8c 100644
--- a/include/ehs/db/DbType.h
+++ b/include/ehs/db/DbType.h
@@ -22,5 +22,40 @@ namespace ehs
 		CHAR_8
 	};
 
-	constexpr UInt_8 DbTypeToSize(DbType type);
+	constexpr UInt_8 DbTypeToSize(const DbType type)
+	{
+		switch (type)
+		{
+			case DbType::SINT_64:
+				return 8;
+			case DbType::UINT_64:
+				return 8;
+			case DbType::SINT_32:
+				return 4;
+			case DbType::UINT_32:
+				return 4;
+			case DbType::SINT_16:
+				return 2;
+			case DbType::UINT_16:
+				return 2;
+			case DbType::SINT_8:
+				return 1;
+			case DbType::UINT_8:
+				return 1;
+			case DbType::FLOAT:
+				return 4;
+			case DbType::DOUBLE:
+				return 8;
+			case DbType::BOOLEAN:
+				return 1;
+			case DbType::CHAR_32:
+				return 4;
+			case DbType::CHAR_16:
+				return 2;
+			case DbType::CHAR_8:
+				return 1;
+			default:
+				return 0;
+		}
+	}
 }
diff --git a/include/ehs/db/DbVar.h b/include/ehs/db/DbVar.h
index eb0e57d..5d3b8ae 100644
--- a/include/ehs/db/DbVar.h
+++ b/include/ehs/db/DbVar.h
@@ -1,37 +1,56 @@
 #pragma once
 
 #include "ehs/Types.h"
+#include "DbType.h"
+#include "ehs/Serializer.h"
 
 namespace ehs
 {
+	class DbVarTmpl;
+	class DbObject;
+
 	class DbVar
 	{
 	private:
+		friend class DbObject;
+		friend class DbVarTmpl;
+
 		UInt_64 hashId;
+		DbObject *parent;
+		DbVarTmpl *master;
 		UInt_64 size;
-		Byte* data;
+		Byte *data;
 
 	public:
 		~DbVar();
 
 		DbVar();
 
-		DbVar(UInt_64 hashId, UInt_64 size, Byte* data);
+		DbVar(UInt_64 hashId, DbVarTmpl *master, UInt_64 size, const Byte *data);
 
-		DbVar(DbVar&& var) noexcept;
+		DbVar(DbVar &&var) noexcept;
 
-		DbVar(const DbVar& var);
+		DbVar(const DbVar &var);
 
-		DbVar& operator=(DbVar&& var) noexcept;
+		DbVar &operator=(DbVar &&var) noexcept;
 
-		DbVar& operator=(const DbVar& var);
+		DbVar &operator=(const DbVar &var);
 
-		explicit operator Byte*() const;
+		explicit operator Byte *() const;
 
 		UInt_64 GetHashId() const;
 
 		UInt_64 GetSize() const;
 
+		void SetData(UInt_64 newSize, const Byte* newData);
+
+		void SetData(const Byte* newData);
+
 		Byte* GetData() const;
+
+	private:
+		void Serialize(Serializer<UInt_64> &data) const;
+
+		void Deserialize(Serializer<UInt_64> &data);
 	};
-}
\ No newline at end of file
+}
diff --git a/include/ehs/db/DbVarTmpl.h b/include/ehs/db/DbVarTmpl.h
index ab92b0a..282b0bf 100644
--- a/include/ehs/db/DbVarTmpl.h
+++ b/include/ehs/db/DbVarTmpl.h
@@ -2,23 +2,35 @@
 
 #include "DbType.h"
 #include "ehs/EHS.h"
-#include "ehs/BaseObj.h"
+#include "ehs/Serializer.h"
 #include "ehs/Str.h"
 
 namespace ehs
 {
-	class DbVarTmpl : public BaseObj
+	class DbVar;
+
+	class DbVarTmpl
 	{
 	private:
+		friend class DbTable;
+		friend class DbVar;
+
 		UInt_64 hashId;
 		Str_8 id;
 		DbType type;
 		bool array;
+		UInt_64 size;
+		Byte* def;
+		Array<DbVar*> slaves;
 
 	public:
+		~DbVarTmpl();
+
 		DbVarTmpl();
 
-		DbVarTmpl(Str_8 id, DbType type, bool array);
+		DbVarTmpl(Str_8 id, DbType type, UInt_64 size, const Byte* def);
+
+		DbVarTmpl(Str_8 id, DbType type, const Byte* def);
 
 		DbVarTmpl(DbVarTmpl&& varTmpl) noexcept;
 
@@ -41,5 +53,16 @@ namespace ehs
 		void SetIsArray(bool value);
 
 		bool IsArray() const;
+
+		UInt_64 GetSize() const;
+
+		Byte* GetDefault() const;
+
+	private:
+		void UpdateSlave(const DbVar *oldSlave, DbVar *newSlave) const;
+
+		void Serialize(Serializer<UInt_64> &data) const;
+
+		void Deserialize(Serializer<UInt_64> &data);
 	};
 }
diff --git a/include/ehs/io/BaseDirectory.h b/include/ehs/io/BaseDirectory.h
new file mode 100644
index 0000000..bd8f1ea
--- /dev/null
+++ b/include/ehs/io/BaseDirectory.h
@@ -0,0 +1,13 @@
+#pragma once
+
+#include "ehs/Array.h"
+#include "ehs/Str.h"
+
+namespace ehs
+{
+	class BaseDirectory
+	{
+	public:
+		static Array<Str_8> GetAllFiles(const Str_8& dir);
+	};
+}
\ No newline at end of file
diff --git a/include/ehs/io/Directory.h b/include/ehs/io/Directory.h
new file mode 100644
index 0000000..9d48339
--- /dev/null
+++ b/include/ehs/io/Directory.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "ehs/system/OS.h"
+
+#if defined(EHS_OS_WINDOWS)
+#include "Directory_W32.h"
+#elif defined(EHS_OS_LINUX)
+#include "Directory_LNX.h"
+#endif
\ No newline at end of file
diff --git a/include/ehs/io/Directory_LNX.h b/include/ehs/io/Directory_LNX.h
new file mode 100644
index 0000000..a70caec
--- /dev/null
+++ b/include/ehs/io/Directory_LNX.h
@@ -0,0 +1,12 @@
+#pragma once
+
+#include "BaseDirectory.h"
+
+namespace ehs
+{
+	class Directory : public BaseDirectory
+	{
+	public:
+		static Array<Str_8> GetAllFiles(const Str_8& dir);
+	};
+}
\ No newline at end of file
diff --git a/include/ehs/io/File.h b/include/ehs/io/File.h
index d957f51..ba794a3 100644
--- a/include/ehs/io/File.h
+++ b/include/ehs/io/File.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "ehs/EHS.h"
+#include "ehs/system/OS.h"
 
 #if defined(EHS_OS_WINDOWS)
 #include "File_W32.h"
diff --git a/src/db/Database.cpp b/src/db/Database.cpp
new file mode 100644
index 0000000..722de2b
--- /dev/null
+++ b/src/db/Database.cpp
@@ -0,0 +1,148 @@
+#include "ehs/db/Database.h"
+#include "ehs/io/File.h"
+
+namespace ehs
+{
+	Database::Database()
+		: hashId(0)
+	{
+	}
+
+	Database::Database(Str_8 id, const Version& version)
+		: hashId(id.Hash_64()), id((Str_8&&)id), version(version)
+	{
+	}
+
+	Database::Database(const Str_8& filePath)
+	{
+		File file(filePath, Mode::READ, Disposition::OPEN);
+		id = file.GetName();
+		hashId = id.Hash_64();
+		Serializer<UInt_64> data = file.ReadSerializer_64(Endianness::LE, file.Size());
+		file.Release();
+
+		version = data.ReadVersion();
+		tables.Resize(data.Read<UInt_64>());
+
+		for (UInt_64 i = 0; i < tables.Size(); ++i)
+			tables[i].Deserialize(data);
+	}
+
+	Database::Database(Database&& db) noexcept
+		: hashId(db.hashId), id((Str_8&&)db.id), version(db.version), tables((Array<DbTable>&&)db.tables)
+	{
+		db.hashId = 0;
+		db.version = {0, 0, 0};
+	}
+
+	Database::Database(const Database& db)
+		: hashId(db.hashId), id(db.id), version(db.version), tables(db.tables)
+	{
+	}
+
+	Database& Database::operator=(Database&& db) noexcept
+	{
+		if (this == &db)
+			return *this;
+
+		hashId = db.hashId;
+		id = (Str_8&&)db.id;
+		version = db.version;
+		tables = (Array<DbTable>&&)db.tables;
+
+		db.hashId = 0;
+		db.version = {0, 0, 0};
+
+		return *this;
+	}
+
+	Database& Database::operator=(const Database& db)
+	{
+		if (this == &db)
+			return *this;
+
+		hashId = db.hashId;
+		id = db.id;
+		version = db.version;
+		tables = db.tables;
+
+		return *this;
+	}
+
+	UInt_64 Database::GetHashId() const
+	{
+		return hashId;
+	}
+
+	void Database::SetId(Str_8 newId)
+	{
+		hashId = newId.Hash_64();
+		id = (Str_8&&)newId;
+	}
+
+	Str_8 Database::GetId() const
+	{
+		return id;
+	}
+
+	void Database::SetVersion(const Version& newVersion)
+	{
+		version = newVersion;
+	}
+
+	Version Database::GetVersion() const
+	{
+		return version;
+	}
+
+	bool Database::HasTable(UInt_64 hashId) const
+	{
+		for (UInt_64 i = 0; i < tables.Size(); ++i)
+			if (tables[i].GetHashId() == hashId)
+				return true;
+
+		return false;
+	}
+
+	bool Database::HasTable(const Str_8& id) const
+	{
+		return HasTable(id.Hash_64());
+	}
+
+	DbTable* Database::CreateTable(Str_8 id)
+	{
+		if (HasTable(id))
+			return nullptr;
+
+		tables.Push(DbTable((Str_8&&)id));
+
+		return &tables[tables.End()];
+	}
+
+	DbTable* Database::GetTable(UInt_64 hashId) const
+	{
+		for (UInt_64 i = 0; i < tables.Size(); ++i)
+			if (tables[i].GetHashId() == hashId)
+				return &tables[i];
+
+		return nullptr;
+	}
+
+	DbTable* Database::GetTable(const Str_8& id) const
+	{
+		return GetTable(id.Hash_64());
+	}
+
+	void Database::Save(const Str_8& directory) const
+	{
+		Serializer<UInt_64> data(Endianness::LE);
+		data.WriteVersion(version);
+		data.Write(tables.Size());
+
+		for (UInt_64 i = 0; i < tables.Size(); ++i)
+			tables[i].Serialize(data);
+
+		File file(directory + "/" + id + ".ehd", Mode::WRITE, Disposition::CREATE_PERSISTENT);
+		file.WriteSerializer_64(data);
+	}
+}
diff --git a/src/db/DbObject.cpp b/src/db/DbObject.cpp
index f923bba..1e3de63 100644
--- a/src/db/DbObject.cpp
+++ b/src/db/DbObject.cpp
@@ -1,22 +1,29 @@
 #include "ehs/db/DbObject.h"
+#include "ehs/db/DbTable.h"
+#include "ehs/Serializer.h"
+#include "ehs/io/File.h"
 
 namespace ehs
 {
 	DbObject::DbObject()
-		: id(0), loaded(false), parent(nullptr)
+		: id(0), parent(nullptr)
+	{
+	}
+
+	DbObject::DbObject(const UInt_64 id)
+		: id(id), parent(nullptr)
 	{
 	}
 
 	DbObject::DbObject(DbObject&& obj) noexcept
-		: id(obj.id), vars((Array<DbVar>&&)obj.vars), loaded(obj.loaded), parent(obj.parent)
+		: id(obj.id), parent(obj.parent), vars((Array<DbVar>&&)obj.vars)
 	{
 		obj.id = 0;
-		obj.loaded = false;
 		obj.parent = nullptr;
 	}
 
 	DbObject::DbObject(const DbObject& obj)
-		: id(obj.id), vars(obj.vars), loaded(obj.loaded), parent(obj.parent)
+		: id(obj.id), parent(obj.parent), vars(obj.vars)
 	{
 	}
 
@@ -26,12 +33,13 @@ namespace ehs
 			return *this;
 
 		id = obj.id;
-		vars = (Array<DbVar>&&)obj.vars;
-		loaded = obj.loaded;
 		parent = obj.parent;
+		vars = (Array<DbVar>&&)obj.vars;
+
+		for (UInt_64 i = 0; i < vars.Size(); ++i)
+			vars[i].parent = this;
 
 		obj.id = 0;
-		obj.loaded = false;
 		obj.parent = nullptr;
 
 		return *this;
@@ -43,19 +51,21 @@ namespace ehs
 			return *this;
 
 		id = obj.id;
-		vars = obj.vars;
-		loaded = obj.loaded;
 		parent = obj.parent;
+		vars = obj.vars;
+
+		for (UInt_64 i = 0; i < vars.Size(); ++i)
+			vars[i].parent = this;
 
 		return *this;
 	}
 
-	UInt_64 DbObject::GetId()
+	UInt_64 DbObject::GetId() const
 	{
 		return id;
 	}
 
-	bool DbObject::HasVariable(UInt_64 hashId)
+	bool DbObject::HasVariable(const UInt_64 hashId) const
 	{
 		for (UInt_64 i = 0; i < vars.Size(); ++i)
 			if (vars[i].GetHashId() == hashId)
@@ -64,7 +74,7 @@ namespace ehs
 		return false;
 	}
 
-	DbVar* DbObject::GetVariable(UInt_64 hashId) const
+	DbVar* DbObject::GetVariable(const UInt_64 hashId) const
 	{
 		for (UInt_64 i = 0; i < vars.Size(); ++i)
 			if (vars[i].GetHashId() == hashId)
@@ -73,17 +83,40 @@ namespace ehs
 		return nullptr;
 	}
 
-	void DbObject::Save()
+	void DbObject::Save() const
 	{
+		if (!IsLoaded())
+			return;
+
+		Serializer<UInt_64> data(Endianness::LE);
+
+		data.Write(vars.Size());
+
+		for (UInt_64 i = 0; i < vars.Size(); ++i)
+			vars[i].Serialize(data);
+
+		File file(parent->GetId() + "/" + Str_8::FromNum(id), Mode::WRITE, Disposition::CREATE_PERSISTENT);
+		file.WriteSerializer_64(data);
 	}
 
 	void DbObject::Load()
 	{
+		if (IsLoaded())
+			return;
+
+		File file(parent->GetId() + "/" + Str_8::FromNum(id), Mode::READ, Disposition::OPEN);
+		Serializer<UInt_64> data = file.ReadSerializer_64(Endianness::LE, file.Size());
+		file.Release();
+
+		vars.Resize(data.Read<UInt_64>());
+
+		for (UInt_64 i = 0; i < vars.Size(); ++i)
+			vars[i].Deserialize(data);
 	}
 
 	bool DbObject::IsLoaded() const
 	{
-		return loaded;
+		return vars.Size();
 	}
 
 	void DbObject::Free()
@@ -91,8 +124,9 @@ namespace ehs
 		vars.Clear();
 	}
 
-	DbTable* DbObject::GetParent() const
+	void DbObject::CreateVariable(DbVarTmpl* master)
 	{
-		return parent;
+		vars.Push(DbVar(master->GetHashId(), master, master->GetSize(), master->GetDefault()));
+		vars[vars.End()].parent = this;
 	}
 }
diff --git a/src/db/DbTable.cpp b/src/db/DbTable.cpp
new file mode 100644
index 0000000..fbcf108
--- /dev/null
+++ b/src/db/DbTable.cpp
@@ -0,0 +1,178 @@
+#include "ehs/db/DbTable.h"
+#include "ehs/io/Directory.h"
+#include "ehs/io/File_UNX.h"
+
+namespace ehs
+{
+	DbTable::DbTable()
+		: hashId(0)
+	{
+	}
+
+	DbTable::DbTable(Str_8 id)
+		: hashId(id.Hash_64()), id((Str_8&&)id)
+	{
+	}
+
+	DbTable::DbTable(DbTable&& table) noexcept
+		: hashId(table.hashId), id((Str_8&&)table.id), varTmpls((Array<DbVarTmpl>&&)table.varTmpls),
+		objects((Array<DbObject>&&)table.objects)
+	{
+		table.hashId = 0;
+	}
+
+	DbTable::DbTable(const DbTable& table)
+		: hashId(table.hashId), id(table.id), varTmpls(table.varTmpls), objects(table.objects)
+	{
+	}
+
+	DbTable& DbTable::operator=(DbTable&& table) noexcept
+	{
+		if (this == &table)
+			return *this;
+
+		hashId = table.hashId;
+		id = (Str_8&&)table.id;
+		varTmpls = (Array<DbVarTmpl>&&)table.varTmpls;
+		objects = (Array<DbObject>&&)table.objects;
+
+		for (UInt_64 i = 0; i < objects.Size(); ++i)
+			objects[i].parent = this;
+
+		table.hashId = 0;
+
+		return *this;
+	}
+
+	DbTable& DbTable::operator=(const DbTable& table)
+	{
+		if (this == &table)
+			return *this;
+
+		hashId = table.hashId;
+		id = table.id;
+		varTmpls = table.varTmpls;
+		objects = table.objects;
+
+		for (UInt_64 i = 0; i < objects.Size(); ++i)
+			objects[i].parent = this;
+
+		return *this;
+	}
+
+	UInt_64 DbTable::GetHashId() const
+	{
+		return hashId;
+	}
+
+	void DbTable::SetId(Str_8 newId)
+	{
+		hashId = newId.Hash_64();
+		id = (Str_8&&)newId;
+	}
+
+	Str_8 DbTable::GetId() const
+	{
+		return id;
+	}
+
+	bool DbTable::HasVariable(const UInt_64 hashId) const
+	{
+		for (UInt_64 i = 0; i < varTmpls.Size(); ++i)
+			if (varTmpls[i].GetHashId() == hashId)
+				return true;
+
+		return false;
+	}
+
+	bool DbTable::HasVariable(const Str_8& id) const
+	{
+		return HasVariable(id.Hash_64());
+	}
+
+	bool DbTable::CreateVariable(Str_8 id, DbType type, const Byte* const defaultValue)
+	{
+		if (HasVariable(id))
+			return false;
+
+		varTmpls.Push(DbVarTmpl((Str_8&&)id, type, defaultValue));
+
+		DbVarTmpl* var = &varTmpls[varTmpls.End()];
+
+		for (UInt_64 i = 0; i < objects.Size(); ++i)
+			objects[i].CreateVariable(var);
+
+		return true;
+	}
+
+	bool DbTable::CreateVariable(Str_8 id, const DbType type, const UInt_64 size, const Byte* const defaultValue)
+	{
+		if (HasVariable(id))
+			return false;
+
+		varTmpls.Push(DbVarTmpl((Str_8&&)id, type, size, defaultValue));
+
+		DbVarTmpl* var = &varTmpls[varTmpls.End()];
+
+		for (UInt_64 i = 0; i < objects.Size(); ++i)
+			objects[i].CreateVariable(var);
+
+		return true;
+	}
+
+	DbObject* DbTable::CreateObject()
+	{
+		objects.Push(DbObject(objects.Size()));
+
+		DbObject* obj = &objects[objects.End()];
+
+		obj->parent = this;
+
+		for (UInt_64 i = 0; i < varTmpls.Size(); ++i)
+			obj->CreateVariable(&varTmpls[i]);
+
+		return obj;
+	}
+
+	DbVarTmpl* DbTable::GetVariableTemplate(UInt_64 hashId) const
+	{
+		for (UInt_64 i = 0; i < varTmpls.Size(); ++i)
+			if (varTmpls[i].GetHashId() == hashId)
+				return &varTmpls[i];
+
+		return nullptr;
+	}
+
+	void DbTable::Serialize(Serializer<UInt_64>& data) const
+	{
+		data.WriteStr(id);
+		data.Write(varTmpls.Size());
+
+		for (UInt_64 i = 0; i < varTmpls.Size(); ++i)
+			varTmpls[i].Serialize(data);
+
+		for (UInt_64 i = 0; i < objects.Size(); ++i)
+			objects[i].Save();
+	}
+
+	void DbTable::Deserialize(Serializer<UInt_64>& data)
+	{
+		id = data.ReadStr<Char_8, UInt_64>();
+		hashId = id.Hash_64();
+
+		varTmpls.Resize(data.Read<UInt_64>());
+
+		for (UInt_64 i = 0; i < varTmpls.Size(); ++i)
+			varTmpls[i].Deserialize(data);
+
+		Array<Str_8> files = Directory::GetAllFiles(id);
+		for (UInt_64 i = 0; i < files.Size(); ++i)
+		{
+			if (File::ParseExt_8(files[i]) != "eho")
+				continue;
+
+			objects.Push(DbObject(File::ParseName_8(files[i]).ToDecimal<UInt_64>()));
+			objects[objects.End()].parent = this;
+		}
+	}
+}
diff --git a/src/db/DbType.cpp b/src/db/DbType.cpp
deleted file mode 100644
index 5f83f28..0000000
--- a/src/db/DbType.cpp
+++ /dev/null
@@ -1,39 +0,0 @@
-#include "ehs/db/DbType.h"
-
-namespace ehs
-{
-	constexpr UInt_8 DbTypeToSize(const DbType type)
-	{
-		switch (type)
-		{
-			case DbType::SINT_64:
-				return 8;
-			case DbType::UINT_64:
-				return 8;
-			case DbType::SINT_32:
-				return 4;
-			case DbType::UINT_32:
-				return 4;
-			case DbType::SINT_16:
-				return 2;
-			case DbType::UINT_16:
-				return 2;
-			case DbType::SINT_8:
-				return 1;
-			case DbType::UINT_8:
-				return 1;
-			case DbType::FLOAT:
-				return 4;
-			case DbType::DOUBLE:
-				return 8;
-			case DbType::BOOLEAN:
-				return 1;
-			case DbType::CHAR_32:
-				return 4;
-			case DbType::CHAR_16:
-				return 2;
-			case DbType::CHAR_8:
-				return 1;
-		}
-	}
-}
\ No newline at end of file
diff --git a/src/db/DbVar.cpp b/src/db/DbVar.cpp
index 2ce0930..30a5d38 100644
--- a/src/db/DbVar.cpp
+++ b/src/db/DbVar.cpp
@@ -1,4 +1,8 @@
 #include "ehs/db/DbVar.h"
+#include "ehs/Util.h"
+#include "ehs/db/DbObject.h"
+#include "ehs/db/DbTable.h"
+#include "ehs/db/DbVarTmpl.h"
 
 namespace ehs
 {
@@ -8,29 +12,35 @@ namespace ehs
 	}
 
 	DbVar::DbVar()
-		: hashId(0), size(0), data(nullptr)
+		: hashId(0), parent(nullptr), master(nullptr), size(0), data(nullptr)
 	{
 	}
 
-	DbVar::DbVar(UInt_64 hashId, UInt_64 size, Byte* data)
-		: hashId(hashId), size(size), data(data)
+	DbVar::DbVar(const UInt_64 hashId, DbVarTmpl *master, const UInt_64 size, const Byte *const data)
+		: hashId(hashId), parent(nullptr), master(master), size(size), data(new Byte[DbTypeToSize(master->GetType()) * size])
 	{
+		master->slaves.Push(this);
+		Util::Copy(this->data, data, DbTypeToSize(master->GetType()) * size);
 	}
 
-	DbVar::DbVar(DbVar&& var) noexcept
-		: hashId(var.hashId), size(var.size), data(var.data)
+	DbVar::DbVar(DbVar &&var) noexcept
+		: hashId(var.hashId), parent(var.parent), master(var.master), size(var.size), data(var.data)
 	{
+		master->UpdateSlave(&var, this);
+
 		var.hashId = 0;
+		var.parent = nullptr;
+		var.master = nullptr;
 		var.size = 0;
 		var.data = nullptr;
 	}
 
-	DbVar::DbVar(const DbVar& var)
-		: hashId(0), size(0), data(nullptr)
+	DbVar::DbVar(const DbVar &var)
+		: hashId(0), parent(nullptr), master(nullptr), size(0), data(nullptr)
 	{
 	}
 
-	DbVar& DbVar::operator=(DbVar&& var) noexcept
+	DbVar &DbVar::operator=(DbVar &&var) noexcept
 	{
 		if (this == &var)
 			return *this;
@@ -38,17 +48,22 @@ namespace ehs
 		delete[] data;
 
 		hashId = var.hashId;
+		parent = var.parent;
+		master = var.master;
 		size = var.size;
 		data = var.data;
 
+		master->UpdateSlave(&var, this);
+
 		var.hashId = 0;
+		var.master = nullptr;
 		var.size = 0;
 		var.data = nullptr;
 
 		return *this;
 	}
 
-	DbVar& DbVar::operator=(const DbVar& var)
+	DbVar &DbVar::operator=(const DbVar &var)
 	{
 		if (this == &var)
 			return *this;
@@ -56,13 +71,15 @@ namespace ehs
 		delete[] data;
 
 		hashId = 0;
+		parent = nullptr;
+		master = nullptr;
 		size = 0;
 		data = nullptr;
 
 		return *this;
 	}
 
-	DbVar::operator Byte*() const
+	DbVar::operator Byte *() const
 	{
 		return data;
 	}
@@ -77,8 +94,54 @@ namespace ehs
 		return size;
 	}
 
+	void DbVar::SetData(const UInt_64 newSize, const Byte* const newData)
+	{
+		if (!master->IsArray())
+			return;
+
+		size = newSize;
+
+		const UInt_64 byteSize = DbTypeToSize(master->GetType()) * newSize;
+
+		data = new Byte[byteSize];
+
+		Util::Copy(data, newData, byteSize);
+	}
+
+	void DbVar::SetData(const Byte* newData)
+	{
+		size = 1;
+
+		const UInt_64 byteSize = DbTypeToSize(master->GetType());
+
+		data = new Byte[byteSize];
+
+		Util::Copy(data, newData, byteSize);
+	}
+
 	Byte* DbVar::GetData() const
 	{
 		return data;
 	}
+
+	void DbVar::Serialize(Serializer<UInt_64> &data) const
+	{
+		data.Write(hashId);
+		data.Write(size);
+		data.WriteArray(this->data, DbTypeToSize(master->GetType()) * size);
+	}
+
+	void DbVar::Deserialize(Serializer<UInt_64> &data)
+	{
+		hashId = data.Read<UInt_64>();
+
+		master = parent->parent->GetVariableTemplate(hashId);
+
+		size = data.Read<UInt_64>();
+
+		UInt_64 byteSize = 0;
+		data.ReadArray(this->data, &byteSize);
+		this->data = new Byte[byteSize];
+		data.ReadArray(this->data, &byteSize);
+	}
 }
diff --git a/src/db/DbVarTmpl.cpp b/src/db/DbVarTmpl.cpp
index df1c0c9..aee80c1 100644
--- a/src/db/DbVarTmpl.cpp
+++ b/src/db/DbVarTmpl.cpp
@@ -1,43 +1,71 @@
 #include "ehs/db/DbVarTmpl.h"
+#include "ehs/db/DbVar.h"
 
 namespace ehs
 {
+	DbVarTmpl::~DbVarTmpl()
+	{
+		delete[] def;
+	}
+
 	DbVarTmpl::DbVarTmpl()
-		: hashId(0), type(DbType::SINT_64), array(false)
+		: hashId(0), type(DbType::SINT_64), array(false), size(0), def(nullptr)
 	{
 	}
 
-	DbVarTmpl::DbVarTmpl(Str_8 id, DbType type, bool array)
-		: hashId(id.Hash_64()), id((Str_8&&)id), type(type), array(array)
+	DbVarTmpl::DbVarTmpl(Str_8 id, const DbType type, const UInt_64 size, const Byte* const def)
+		: hashId(id.Hash_64()), id((Str_8&&)id), type(type), array(true), size(size),
+		def(new Byte[DbTypeToSize(type) * size])
 	{
+		Util::Copy(this->def, def, DbTypeToSize(type) * size);
 	}
 
-	DbVarTmpl::DbVarTmpl(DbVarTmpl&& varTmpl) noexcept
-		: hashId(varTmpl.hashId), id((Str_8&&)varTmpl.id), type(varTmpl.type), array(varTmpl.array)
+	DbVarTmpl::DbVarTmpl(Str_8 id, const DbType type, const Byte* const def)
+		: hashId(id.Hash_64()), id((Str_8&&)id), type(type), array(false), size(1), def(new Byte[DbTypeToSize(type)])
+	{
+		Util::Copy(this->def, def, DbTypeToSize(type));
+	}
+
+	DbVarTmpl::DbVarTmpl(DbVarTmpl &&varTmpl) noexcept
+		: hashId(varTmpl.hashId), id((Str_8&&)varTmpl.id), type(varTmpl.type), array(varTmpl.array), size(varTmpl.size),
+		def(varTmpl.def)
 	{
 		varTmpl.hashId = 0;
 		varTmpl.type = DbType::SINT_64;
 		varTmpl.array = false;
+		varTmpl.size = 0;
+		varTmpl.def = nullptr;
 	}
 
-	DbVarTmpl::DbVarTmpl(const DbVarTmpl& varTmpl)
-		: hashId(varTmpl.hashId), id(varTmpl.id), type(varTmpl.type), array(varTmpl.array)
+	DbVarTmpl::DbVarTmpl(const DbVarTmpl &varTmpl)
+		: hashId(varTmpl.hashId), id(varTmpl.id), type(varTmpl.type), array(varTmpl.array), size(varTmpl.size),
+		def(varTmpl.def)
 	{
 	}
 
-	DbVarTmpl& DbVarTmpl::operator=(DbVarTmpl&& varTmpl) noexcept
+	DbVarTmpl &DbVarTmpl::operator=(DbVarTmpl &&varTmpl) noexcept
 	{
 		if (this == &varTmpl)
 			return *this;
 
+		delete[] def;
+
 		hashId = varTmpl.hashId;
 		id = (Str_8&&)varTmpl.id;
 		type = varTmpl.type;
 		array = varTmpl.array;
+		size = varTmpl.size;
+		def = varTmpl.def;
+		slaves = (Array<DbVar*>&&)varTmpl.slaves;
+
+		for (UInt_64 i = 0; i < slaves.Size(); ++i)
+			slaves[i]->master = this;
 
 		varTmpl.hashId = 0;
 		varTmpl.type = DbType::SINT_64;
 		varTmpl.array = false;
+		varTmpl.size = 0;
+		varTmpl.def = nullptr;
 
 		return *this;
 	}
@@ -47,10 +75,20 @@ namespace ehs
 		if (this == &varTmpl)
 			return *this;
 
+		delete[] def;
+
 		hashId = varTmpl.hashId;
 		id = varTmpl.id;
 		type = varTmpl.type;
 		array = varTmpl.array;
+		size = varTmpl.size;
+		slaves = varTmpl.slaves;
+
+		const UInt_64 byteSize = DbTypeToSize(varTmpl.type) * varTmpl.size;
+
+		def = new Byte[byteSize];
+
+		Util::Copy(def, varTmpl.def, byteSize);
 
 		return *this;
 	}
@@ -71,7 +109,7 @@ namespace ehs
 		return id;
 	}
 
-	void DbVarTmpl::SetType(DbType newType)
+	void DbVarTmpl::SetType(const DbType newType)
 	{
 		type = newType;
 	}
@@ -81,7 +119,7 @@ namespace ehs
 		return type;
 	}
 
-	void DbVarTmpl::SetIsArray(bool value)
+	void DbVarTmpl::SetIsArray(const bool value)
 	{
 		array = value;
 	}
@@ -90,4 +128,44 @@ namespace ehs
 	{
 		return array;
 	}
+
+	UInt_64 DbVarTmpl::GetSize() const
+	{
+		return size;
+	}
+
+	Byte* DbVarTmpl::GetDefault() const
+	{
+		return def;
+	}
+
+	void DbVarTmpl::UpdateSlave(const DbVar* const oldSlave, DbVar* const newSlave) const
+	{
+		for (UInt_64 i = 0; i < slaves.Size(); ++i)
+			if (slaves[i] == oldSlave)
+				slaves[i] = newSlave;
+	}
+
+	void DbVarTmpl::Serialize(Serializer<UInt_64> &data) const
+	{
+		data.WriteStr(id);
+		data.Write(type);
+		data.Write(array);
+		data.Write(size);
+		data.WriteArray(def, DbTypeToSize(type) * size);
+	}
+
+	void DbVarTmpl::Deserialize(Serializer<UInt_64> &data)
+	{
+		id = data.ReadStr<Char_8, UInt_64>();
+		hashId = id.Hash_64();
+		type = data.Read<DbType>();
+		array = data.Read<bool>();
+		size = data.Read<UInt_64>();
+
+		UInt_64 byteSize = 0;
+		data.ReadArray(def, &byteSize);
+		def = new Byte[byteSize];
+		data.ReadArray(def, &byteSize);
+	}
 }
diff --git a/src/io/BaseDirectory.cpp b/src/io/BaseDirectory.cpp
new file mode 100644
index 0000000..3cfac5c
--- /dev/null
+++ b/src/io/BaseDirectory.cpp
@@ -0,0 +1,9 @@
+#include "ehs/io/BaseDirectory.h"
+
+namespace ehs
+{
+	Array<Str_8> BaseDirectory::GetAllFiles(const Str_8& dir)
+	{
+		return {};
+	}
+}
diff --git a/src/io/Directory_LNX.cpp b/src/io/Directory_LNX.cpp
new file mode 100644
index 0000000..e4d55a0
--- /dev/null
+++ b/src/io/Directory_LNX.cpp
@@ -0,0 +1,28 @@
+#include "ehs/io/Directory_LNX.h"
+#include "ehs/Log.h"
+
+#include <dirent.h>
+
+namespace ehs
+{
+	Array<Str_8> Directory::GetAllFiles(const Str_8& dir)
+	{
+		Array<Str_8> result;
+
+		DIR* hdl = opendir(dir);
+		if (!dir)
+		{
+			EHS_LOG_INT("Error", 0, "Failed to open directory, \"" + dir + "\".");
+			return result;
+		}
+
+		dirent* entry;
+		while ((entry = readdir(hdl)))
+			if (entry->d_type == DT_REG)
+				result.Push(entry->d_name);
+
+		closedir(hdl);
+
+		return result;
+	}
+}