diff --git a/packages-user/data-common/src/save/index.ts b/packages-user/data-common/src/save/index.ts
index 1603d0d..213e667 100644
--- a/packages-user/data-common/src/save/index.ts
+++ b/packages-user/data-common/src/save/index.ts
@@ -1,3 +1,2 @@
 export * from './system';
-export * from './memory';
 export * from './types';
diff --git a/packages-user/data-common/src/save/memory.ts b/packages-user/data-common/src/save/memory.ts
deleted file mode 100644
index 2802e3b..0000000
--- a/packages-user/data-common/src/save/memory.ts
+++ /dev/null
@@ -1,152 +0,0 @@
-import { Dexie, Table } from 'dexie';
-import { isNil } from 'lodash-es';
-import {
-    IGlobalTrasaction,
-    ISaveRead,
-    ISaveSystem,
-    ISaveSystemConfig,
-    ISaveableContent,
-    SaveCompression
-} from './types';
-
-interface MemorySaveRecord {
-    readonly compression: SaveCompression;
-    readonly data: Map<string, unknown>;
-}
-
-class MemoryGlobalTransaction implements IGlobalTrasaction {
-    readonly table!: Table<unknown, string>;
-
-    constructor(private readonly values: Map<string, unknown>) {}
-
-    async get<T>(key: string): Promise<T> {
-        return this.values.get(key) as T;
-    }
-
-    async set(key: string, value: unknown): Promise<void> {
-        this.values.set(key, value);
-    }
-}
-
-export class MemorySaveSystem implements ISaveSystem {
-    db!: Dexie;
-
-    private readonly saves: Map<number, MemorySaveRecord> = new Map();
-    private readonly values: Map<string, unknown> = new Map();
-    private readonly undoStack: ISaveRead[] = [];
-    private readonly redoStack: ISaveRead[] = [];
-    private stackSize: number = 20;
-    private autosaveLevel: SaveCompression = SaveCompression.LowCompression;
-    private commonSaveLevel: SaveCompression = SaveCompression.HighCompression;
-
-    init(): void {}
-
-    config(config: Readonly<Partial<ISaveSystemConfig>>): void {
-        if (!isNil(config.autosaveLevel)) {
-            this.autosaveLevel = config.autosaveLevel;
-        }
-        if (!isNil(config.commonSaveLevel)) {
-            this.commonSaveLevel = config.commonSaveLevel;
-        }
-        if (!isNil(config.autosaveStackSize)) {
-            this.stackSize = config.autosaveStackSize;
-            this.trim(this.undoStack);
-            this.trim(this.redoStack);
-        }
-    }
-
-    undoAutosave(
-        current: Map<string, ISaveableContent<unknown>>
-    ): ISaveRead | null {
-        if (this.undoStack.length === 0) return null;
-        this.redoStack.push(this.capture(current, this.autosaveLevel));
-        this.trim(this.redoStack);
-        return this.undoStack.pop()!;
-    }
-
-    redoAutosave(
-        current: Map<string, ISaveableContent<unknown>>
-    ): ISaveRead | null {
-        if (this.redoStack.length === 0) return null;
-        this.undoStack.push(this.capture(current, this.autosaveLevel));
-        this.trim(this.undoStack);
-        return this.redoStack.pop()!;
-    }
-
-    getUndoStack(): ISaveRead[] {
-        return this.undoStack.slice();
-    }
-
-    getRedoStack(): ISaveRead[] {
-        return this.redoStack.slice();
-    }
-
-    autosave(state: Map<string, ISaveableContent<unknown>>): void {
-        this.undoStack.push(this.capture(state, this.autosaveLevel));
-        this.redoStack.length = 0;
-        this.trim(this.undoStack);
-    }
-
-    async saveAutosaveToDB(): Promise<void> {}
-
-    async save(
-        id: number,
-        state: Map<string, ISaveableContent<unknown>>
-    ): Promise<void> {
-        this.saves.set(id, this.captureRecord(state, this.commonSaveLevel));
-        await this.setGlobal('lastSlot', id);
-    }
-
-    async load(id: number): Promise<ISaveRead | null> {
-        const record = this.saves.get(id);
-        if (!record) return null;
-        return { compression: record.compression, data: record.data };
-    }
-
-    async deleteSave(id: number): Promise<void> {
-        this.saves.delete(id);
-    }
-
-    async getLastSlot(): Promise<number> {
-        return (await this.getGlobal<number>('lastSlot')) ?? 0;
-    }
-
-    async getGlobal<T>(key: string): Promise<T | null> {
-        return this.values.has(key) ? (this.values.get(key) as T) : null;
-    }
-
-    async setGlobal(key: string, value: unknown): Promise<void> {
-        this.values.set(key, value);
-    }
-
-    async startGlobalTransaction<R>(
-        handle: (transaction: IGlobalTrasaction) => PromiseLike<R>
-    ): Promise<R> {
-        return handle(new MemoryGlobalTransaction(this.values));
-    }
-
-    private capture(
-        state: Map<string, ISaveableContent<unknown>>,
-        compression: SaveCompression
-    ): ISaveRead {
-        const record = this.captureRecord(state, compression);
-        return { compression: record.compression, data: record.data };
-    }
-
-    private captureRecord(
-        state: Map<string, ISaveableContent<unknown>>,
-        compression: SaveCompression
-    ): MemorySaveRecord {
-        const data = new Map<string, unknown>();
-        for (const [key, content] of state) {
-            data.set(key, content.saveState(compression));
-        }
-        return { compression, data };
-    }
-
-    private trim(stack: ISaveRead[]): void {
-        if (stack.length > this.stackSize) {
-            stack.splice(0, stack.length - this.stackSize);
-        }
-    }
-}