diff --git a/packages/filesystem/googledrive/googledrive.test.ts b/packages/filesystem/googledrive/googledrive.test.ts
index a6e099bc6..ccd276a92 100644
--- a/packages/filesystem/googledrive/googledrive.test.ts
+++ b/packages/filesystem/googledrive/googledrive.test.ts
@@ -25,4 +25,38 @@ describe("GoogleDriveFileSystem", () => {
 
     await expect(fs.delete("missing.txt")).resolves.toBeUndefined();
   });
+
+  it("ensureDirExists should create missing nested directories and return final id", async () => {
+    const fs = new GoogleDriveFileSystem("/", "token");
+    const findSpy = vi.spyOn(fs, "findFolderByName").mockResolvedValue(null);
+    const createSpy = vi
+      .spyOn(fs, "createFolder")
+      .mockResolvedValueOnce({ id: "id-A", name: "A" })
+      .mockResolvedValueOnce({ id: "id-B", name: "B" });
+
+    await expect(fs.ensureDirExists("/A/B")).resolves.toBe("id-B");
+
+    expect(findSpy.mock.calls).toEqual([
+      ["A", "appDataFolder"],
+      ["B", "id-A"],
+    ]);
+    expect(createSpy.mock.calls).toEqual([
+      ["A", "appDataFolder"],
+      ["B", "id-A"],
+    ]);
+  });
+
+  it("writer should ensure directory from root when filesystem is opened in subdir", async () => {
+    const fs = new GoogleDriveFileSystem("/Base", "token");
+    const writer = await fs.create("file.txt");
+    const ensureSpy = vi.spyOn(fs, "ensureDirExists").mockResolvedValue("base-id");
+    const findSpy = vi.spyOn(fs, "findFileInDirectory").mockResolvedValue(null);
+    const requestSpy = vi.spyOn(fs, "request").mockResolvedValue({});
+
+    await expect(writer.write("content")).resolves.toBeUndefined();
+
+    expect(ensureSpy).toHaveBeenCalledWith("/Base");
+    expect(findSpy).toHaveBeenCalledWith("file.txt", "base-id");
+    expect(requestSpy).toHaveBeenCalledTimes(1);
+  });
 });
diff --git a/packages/filesystem/googledrive/googledrive.ts b/packages/filesystem/googledrive/googledrive.ts
index fb54786e2..fc3821787 100644
--- a/packages/filesystem/googledrive/googledrive.ts
+++ b/packages/filesystem/googledrive/googledrive.ts
@@ -40,6 +40,14 @@ export default class GoogleDriveFileSystem implements FileSystem {
     }
 
     const fullPath = joinPath(this.path, dir);
+    await this.ensureDirPath(fullPath);
+  }
+
+  private async ensureDirPath(fullPath: string): Promise<string> {
+    if (fullPath === "/" || fullPath === "") {
+      return "appDataFolder";
+    }
+
     const dirs = fullPath.split("/").filter(Boolean);
 
     // 从根目录开始逐级创建目录
@@ -69,7 +77,7 @@ export default class GoogleDriveFileSystem implements FileSystem {
       parentId = folderId;
     }
 
-    return Promise.resolve();
+    return parentId;
   }
   async findFolderByName(name: string, parentId: string): Promise<{ id: string; name: string } | null> {
     const query = `name='${name}' and mimeType='application/vnd.google-apps.folder' and '${parentId}' in parents and trashed=false`;
@@ -315,24 +323,6 @@ export default class GoogleDriveFileSystem implements FileSystem {
 
   // 确保目录存在并返回目录ID，优化Writer避免重复获取
   async ensureDirExists(dirPath: string): Promise<string> {
-    if (dirPath === "/" || dirPath === "") {
-      return "appDataFolder";
-    }
-
-    // 先检查缓存
-    const cachedId = this.pathToIdCache.get(dirPath);
-    if (cachedId) {
-      return cachedId;
-    }
-
-    // 如果没有缓存，使用getFileId方法
-    const foundId = await this.getFileId(dirPath);
-    if (!foundId) {
-      throw new Error(`Failed to create or find directory: ${dirPath}`);
-    }
-
-    // 缓存结果
-    this.pathToIdCache.set(dirPath, foundId);
-    return foundId;
+    return this.ensureDirPath(dirPath);
   }
 }