diff --git a/app/src/api/admin.ts b/app/src/api/admin.ts
index de9d72b..b38f483 100644
--- a/app/src/api/admin.ts
+++ b/app/src/api/admin.ts
@@ -7,10 +7,10 @@ import { apiCall } from './api';
 import {
   isSystemStats,
   isUser,
-  isWorkspace,
+  isWorkspaceStats,
   type SystemStats,
   type User,
-  type Workspace,
+  type WorkspaceStats,
 } from '@/types/models';
 
 const ADMIN_BASE_URL = `${API_BASE_URL}/admin`;
@@ -101,18 +101,18 @@ export const updateUser = async (
 
 /**
  * Fetches all workspaces from the API
- * @returns {Promise<Workspace[]>} A promise that resolves to an array of workspaces
+ * @returns {Promise<WorkspaceStats[]>} A promise that resolves to an array of workspaces
  * @throws {Error} If the API call fails or returns an invalid response
  * */
-export const getWorkspaces = async (): Promise<Workspace[]> => {
+export const getWorkspaces = async (): Promise<WorkspaceStats[]> => {
   const response = await apiCall(`${ADMIN_BASE_URL}/workspaces`);
   const data: unknown = await response.json();
   if (!Array.isArray(data)) {
     throw new Error('Invalid workspaces response received from API');
   }
   return data.map((workspace) => {
-    if (!isWorkspace(workspace)) {
-      throw new Error('Invalid workspace object received from API');
+    if (!isWorkspaceStats(workspace)) {
+      throw new Error('Invalid workspace stats object received from API');
     }
     return workspace;
   });
diff --git a/app/src/hooks/useAdminData.test.ts b/app/src/hooks/useAdminData.test.ts
new file mode 100644
index 0000000..a3fd306
--- /dev/null
+++ b/app/src/hooks/useAdminData.test.ts
@@ -0,0 +1,608 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { renderHook, act, waitFor } from '@testing-library/react';
+import { useAdminData } from './useAdminData';
+import * as adminApi from '@/api/admin';
+import {
+  UserRole,
+  type SystemStats,
+  type User,
+  type WorkspaceStats,
+} from '@/types/models';
+
+// Mock dependencies
+vi.mock('@/api/admin');
+vi.mock('@mantine/notifications', () => ({
+  notifications: {
+    show: vi.fn(),
+  },
+}));
+
+// Import notifications for assertions
+import { notifications } from '@mantine/notifications';
+
+// Mock data
+const mockSystemStats: SystemStats = {
+  totalUsers: 10,
+  activeUsers: 8,
+  totalWorkspaces: 15,
+  totalFiles: 150,
+  totalSize: 1024000,
+};
+
+const mockUsers: User[] = [
+  {
+    id: 1,
+    email: 'admin@example.com',
+    displayName: 'Admin User',
+    role: UserRole.Admin,
+    createdAt: '2024-01-01T00:00:00Z',
+    lastWorkspaceId: 1,
+  },
+  {
+    id: 2,
+    email: 'editor@example.com',
+    displayName: 'Editor User',
+    role: UserRole.Editor,
+    createdAt: '2024-01-02T00:00:00Z',
+    lastWorkspaceId: 2,
+  },
+];
+
+const mockWorkspaceStats: WorkspaceStats[] = [
+  {
+    userID: 1,
+    userEmail: 'admin@example.com',
+    workspaceID: 1,
+    workspaceName: 'admin-workspace',
+    workspaceCreatedAt: '2024-01-01T00:00:00Z',
+    fileCountStats: {
+      totalFiles: 10,
+      totalSize: 204800,
+    },
+  },
+  {
+    userID: 2,
+    userEmail: 'editor@example.com',
+    workspaceID: 2,
+    workspaceName: 'editor-workspace',
+    workspaceCreatedAt: '2024-01-02T00:00:00Z',
+    fileCountStats: {
+      totalFiles: 15,
+      totalSize: 307200,
+    },
+  },
+];
+
+describe('useAdminData', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  afterEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  describe('stats data type', () => {
+    it('initializes with empty stats and loading state', () => {
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      expect(result.current.data).toEqual({});
+      expect(result.current.loading).toBe(true);
+      expect(result.current.error).toBeNull();
+      expect(typeof result.current.reload).toBe('function');
+    });
+
+    it('loads system stats successfully', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats.mockResolvedValue(mockSystemStats);
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual(mockSystemStats);
+      expect(result.current.error).toBeNull();
+      expect(mockGetSystemStats).toHaveBeenCalledTimes(1);
+    });
+
+    it('handles stats loading errors', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats.mockRejectedValue(new Error('Failed to load stats'));
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual({});
+      expect(result.current.error).toBe('Failed to load stats');
+      expect(notifications.show).toHaveBeenCalledWith({
+        title: 'Error',
+        message: 'Failed to load stats: Failed to load stats',
+        color: 'red',
+      });
+    });
+
+    it('reloads stats data', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats.mockResolvedValue(mockSystemStats);
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(mockGetSystemStats).toHaveBeenCalledTimes(1);
+
+      await act(async () => {
+        await result.current.reload();
+      });
+
+      expect(mockGetSystemStats).toHaveBeenCalledTimes(2);
+      expect(result.current.data).toEqual(mockSystemStats);
+    });
+  });
+
+  describe('users data type', () => {
+    it('initializes with empty users array and loading state', () => {
+      const { result } = renderHook(() => useAdminData('users'));
+
+      expect(result.current.data).toEqual([]);
+      expect(result.current.loading).toBe(true);
+      expect(result.current.error).toBeNull();
+      expect(typeof result.current.reload).toBe('function');
+    });
+
+    it('loads users successfully', async () => {
+      const mockGetUsers = vi.mocked(adminApi.getUsers);
+      mockGetUsers.mockResolvedValue(mockUsers);
+
+      const { result } = renderHook(() => useAdminData('users'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual(mockUsers);
+      expect(result.current.error).toBeNull();
+      expect(mockGetUsers).toHaveBeenCalledTimes(1);
+    });
+
+    it('handles users loading errors', async () => {
+      const mockGetUsers = vi.mocked(adminApi.getUsers);
+      mockGetUsers.mockRejectedValue(new Error('Failed to load users'));
+
+      const { result } = renderHook(() => useAdminData('users'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual([]);
+      expect(result.current.error).toBe('Failed to load users');
+      expect(notifications.show).toHaveBeenCalledWith({
+        title: 'Error',
+        message: 'Failed to load users: Failed to load users',
+        color: 'red',
+      });
+    });
+
+    it('reloads users data', async () => {
+      const mockGetUsers = vi.mocked(adminApi.getUsers);
+      mockGetUsers.mockResolvedValue(mockUsers);
+
+      const { result } = renderHook(() => useAdminData('users'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(mockGetUsers).toHaveBeenCalledTimes(1);
+
+      await act(async () => {
+        await result.current.reload();
+      });
+
+      expect(mockGetUsers).toHaveBeenCalledTimes(2);
+      expect(result.current.data).toEqual(mockUsers);
+    });
+
+    it('handles empty users array', async () => {
+      const mockGetUsers = vi.mocked(adminApi.getUsers);
+      mockGetUsers.mockResolvedValue([]);
+
+      const { result } = renderHook(() => useAdminData('users'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual([]);
+      expect(result.current.error).toBeNull();
+    });
+  });
+
+  describe('workspaces data type', () => {
+    it('initializes with empty workspaces array and loading state', () => {
+      const { result } = renderHook(() => useAdminData('workspaces'));
+
+      expect(result.current.data).toEqual([]);
+      expect(result.current.loading).toBe(true);
+      expect(result.current.error).toBeNull();
+      expect(typeof result.current.reload).toBe('function');
+    });
+
+    it('loads workspaces successfully', async () => {
+      const mockGetWorkspaces = vi.mocked(adminApi.getWorkspaces);
+      mockGetWorkspaces.mockResolvedValue(mockWorkspaceStats);
+
+      const { result } = renderHook(() => useAdminData('workspaces'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual(mockWorkspaceStats);
+      expect(result.current.error).toBeNull();
+      expect(mockGetWorkspaces).toHaveBeenCalledTimes(1);
+    });
+
+    it('handles workspaces loading errors', async () => {
+      const mockGetWorkspaces = vi.mocked(adminApi.getWorkspaces);
+      mockGetWorkspaces.mockRejectedValue(
+        new Error('Failed to load workspaces')
+      );
+
+      const { result } = renderHook(() => useAdminData('workspaces'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual([]);
+      expect(result.current.error).toBe('Failed to load workspaces');
+      expect(notifications.show).toHaveBeenCalledWith({
+        title: 'Error',
+        message: 'Failed to load workspaces: Failed to load workspaces',
+        color: 'red',
+      });
+    });
+
+    it('reloads workspaces data', async () => {
+      const mockGetWorkspaces = vi.mocked(adminApi.getWorkspaces);
+      mockGetWorkspaces.mockResolvedValue(mockWorkspaceStats);
+
+      const { result } = renderHook(() => useAdminData('workspaces'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(mockGetWorkspaces).toHaveBeenCalledTimes(1);
+
+      await act(async () => {
+        await result.current.reload();
+      });
+
+      expect(mockGetWorkspaces).toHaveBeenCalledTimes(2);
+      expect(result.current.data).toEqual(mockWorkspaceStats);
+    });
+
+    it('handles workspaces with minimal configuration', async () => {
+      const minimalWorkspaceStats: WorkspaceStats[] = [
+        {
+          userID: 3,
+          userEmail: 'minimal@example.com',
+          workspaceID: 3,
+          workspaceName: 'minimal-workspace',
+          workspaceCreatedAt: '2024-01-03T00:00:00Z',
+        },
+      ];
+
+      const mockGetWorkspaces = vi.mocked(adminApi.getWorkspaces);
+      mockGetWorkspaces.mockResolvedValue(minimalWorkspaceStats);
+
+      const { result } = renderHook(() => useAdminData('workspaces'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual(minimalWorkspaceStats);
+      expect(result.current.error).toBeNull();
+    });
+  });
+
+  describe('error handling', () => {
+    it('handles API errors with error response object', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      // Create a properly typed error object to simulate API error response
+      const errorWithResponse = new Error('Request failed');
+      type ErrorWithResponse = Error & {
+        response: {
+          data: {
+            error: string;
+          };
+        };
+      };
+      (errorWithResponse as ErrorWithResponse).response = {
+        data: {
+          error: 'Custom API error message',
+        },
+      };
+      mockGetSystemStats.mockRejectedValue(errorWithResponse);
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.error).toBe('Custom API error message');
+      expect(notifications.show).toHaveBeenCalledWith({
+        title: 'Error',
+        message: 'Failed to load stats: Custom API error message',
+        color: 'red',
+      });
+    });
+
+    it('handles unknown errors gracefully', async () => {
+      const mockGetUsers = vi.mocked(adminApi.getUsers);
+      mockGetUsers.mockRejectedValue('String error');
+
+      const { result } = renderHook(() => useAdminData('users'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.error).toBe('An unknown error occurred');
+      expect(notifications.show).toHaveBeenCalledWith({
+        title: 'Error',
+        message: 'Failed to load users: An unknown error occurred',
+        color: 'red',
+      });
+    });
+
+    it('handles network timeout errors', async () => {
+      const mockGetWorkspaces = vi.mocked(adminApi.getWorkspaces);
+      mockGetWorkspaces.mockRejectedValue(new Error('Network timeout'));
+
+      const { result } = renderHook(() => useAdminData('workspaces'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.error).toBe('Network timeout');
+      expect(notifications.show).toHaveBeenCalledWith({
+        title: 'Error',
+        message: 'Failed to load workspaces: Network timeout',
+        color: 'red',
+      });
+    });
+
+    it('clears error on successful reload', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats
+        .mockRejectedValueOnce(new Error('Initial error'))
+        .mockResolvedValueOnce(mockSystemStats);
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      // Wait for initial error
+      await waitFor(() => {
+        expect(result.current.error).toBe('Initial error');
+      });
+
+      // Reload successfully
+      await act(async () => {
+        await result.current.reload();
+      });
+
+      await waitFor(() => {
+        expect(result.current.error).toBeNull();
+        expect(result.current.data).toEqual(mockSystemStats);
+      });
+    });
+  });
+
+  describe('loading state management', () => {
+    it('manages loading state correctly during initial load', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      let resolvePromise: (value: SystemStats) => void;
+      const pendingPromise = new Promise<SystemStats>((resolve) => {
+        resolvePromise = resolve;
+      });
+      mockGetSystemStats.mockReturnValue(pendingPromise);
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      expect(result.current.loading).toBe(true);
+
+      await act(async () => {
+        resolvePromise!(mockSystemStats);
+        await pendingPromise;
+      });
+
+      expect(result.current.loading).toBe(false);
+    });
+
+    it('manages loading state correctly during reload', async () => {
+      const mockGetUsers = vi.mocked(adminApi.getUsers);
+      mockGetUsers.mockResolvedValue(mockUsers);
+
+      const { result } = renderHook(() => useAdminData('users'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      let resolveReload: (value: User[]) => void;
+      const reloadPromise = new Promise<User[]>((resolve) => {
+        resolveReload = resolve;
+      });
+      mockGetUsers.mockReturnValueOnce(reloadPromise);
+
+      act(() => {
+        void result.current.reload();
+      });
+
+      expect(result.current.loading).toBe(true);
+
+      await act(async () => {
+        resolveReload!(mockUsers);
+        await reloadPromise;
+      });
+
+      expect(result.current.loading).toBe(false);
+    });
+
+    it('handles loading state during error scenarios', async () => {
+      const mockGetWorkspaces = vi.mocked(adminApi.getWorkspaces);
+      let rejectPromise: (error: Error) => void;
+      const errorPromise = new Promise<WorkspaceStats[]>((_, reject) => {
+        rejectPromise = reject;
+      });
+      mockGetWorkspaces.mockReturnValue(errorPromise);
+
+      const { result } = renderHook(() => useAdminData('workspaces'));
+
+      expect(result.current.loading).toBe(true);
+
+      await act(async () => {
+        rejectPromise!(new Error('Load failed'));
+        try {
+          await errorPromise;
+        } catch {
+          // Expected to fail
+        }
+      });
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+    });
+  });
+
+  describe('data consistency', () => {
+    it('maintains data consistency across re-renders', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats.mockResolvedValue(mockSystemStats);
+
+      const { result, rerender } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      const initialData = result.current.data;
+
+      rerender();
+
+      expect(result.current.data).toBe(initialData);
+      expect(result.current.data).toEqual(mockSystemStats);
+    });
+
+    it('provides stable reload function across re-renders', () => {
+      const { result, rerender } = renderHook(() => useAdminData('stats'));
+
+      const initialReload = result.current.reload;
+
+      rerender();
+
+      expect(result.current.reload).toBe(initialReload);
+    });
+
+    it('handles data type changes correctly', () => {
+      const { result: statsResult } = renderHook(() => useAdminData('stats'));
+      const { result: usersResult } = renderHook(() => useAdminData('users'));
+      const { result: workspacesResult } = renderHook(() =>
+        useAdminData('workspaces')
+      );
+
+      // Different data types should have different initial values
+      expect(statsResult.current.data).toEqual({});
+      expect(usersResult.current.data).toEqual([]);
+      expect(workspacesResult.current.data).toEqual([]);
+    });
+  });
+
+  describe('function stability', () => {
+    it('maintains stable reload function reference', () => {
+      const { result, rerender } = renderHook(() => useAdminData('stats'));
+
+      const initialReload = result.current.reload;
+
+      rerender();
+
+      expect(result.current.reload).toBe(initialReload);
+    });
+  });
+
+  describe('concurrent operations', () => {
+    it('handles multiple concurrent reloads', async () => {
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats.mockResolvedValue(mockSystemStats);
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      // Trigger multiple reloads
+      await act(async () => {
+        await Promise.all([
+          result.current.reload(),
+          result.current.reload(),
+          result.current.reload(),
+        ]);
+      });
+
+      expect(mockGetSystemStats).toHaveBeenCalledTimes(4); // 1 initial + 3 reloads
+      expect(result.current.data).toEqual(mockSystemStats);
+      expect(result.current.loading).toBe(false);
+    });
+  });
+
+  describe('edge cases', () => {
+    it('handles invalid data type gracefully', async () => {
+      // This would normally be caught by TypeScript, but test runtime behavior
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats.mockRejectedValue(new Error('Invalid data type'));
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.error).toBe('Invalid data type');
+    });
+
+    it('handles partial data responses', async () => {
+      const partialStats = {
+        totalUsers: 5,
+        activeUsers: 3,
+        // Missing other required fields
+      };
+
+      const mockGetSystemStats = vi.mocked(adminApi.getSystemStats);
+      mockGetSystemStats.mockResolvedValue(partialStats as SystemStats);
+
+      const { result } = renderHook(() => useAdminData('stats'));
+
+      await waitFor(() => {
+        expect(result.current.loading).toBe(false);
+      });
+
+      expect(result.current.data).toEqual(partialStats);
+      expect(result.current.error).toBeNull();
+    });
+  });
+});
diff --git a/app/src/types/models.ts b/app/src/types/models.ts
index 8e2f905..89a8967 100644
--- a/app/src/types/models.ts
+++ b/app/src/types/models.ts
@@ -208,12 +208,46 @@ export interface WorkspaceStats {
   fileCountStats?: FileCountStats;
 }
 
+// isWorkspaceStats checks if the given object is a valid WorkspaceStats object
+export function isWorkspaceStats(obj: unknown): obj is WorkspaceStats {
+  return (
+    typeof obj === 'object' &&
+    obj !== null &&
+    'userID' in obj &&
+    typeof (obj as WorkspaceStats).userID === 'number' &&
+    'userEmail' in obj &&
+    typeof (obj as WorkspaceStats).userEmail === 'string' &&
+    'workspaceID' in obj &&
+    typeof (obj as WorkspaceStats).workspaceID === 'number' &&
+    'workspaceName' in obj &&
+    typeof (obj as WorkspaceStats).workspaceName === 'string' &&
+    'workspaceCreatedAt' in obj &&
+    typeof (obj as WorkspaceStats).workspaceCreatedAt === 'string' &&
+    (!('fileCountStats' in obj) ||
+      (obj as WorkspaceStats).fileCountStats === undefined ||
+      (obj as WorkspaceStats).fileCountStats === null ||
+      isFileCountStats((obj as WorkspaceStats).fileCountStats))
+  );
+}
+
 // Define FileCountStats based on the Go struct definition of storage.FileCountStats
 export interface FileCountStats {
   totalFiles: number;
   totalSize: number;
 }
 
+// isFileCountStats checks if the given object is a valid FileCountStats object
+export function isFileCountStats(obj: unknown): obj is FileCountStats {
+  return (
+    typeof obj === 'object' &&
+    obj !== null &&
+    'totalFiles' in obj &&
+    typeof (obj as FileCountStats).totalFiles === 'number' &&
+    'totalSize' in obj &&
+    typeof (obj as FileCountStats).totalSize === 'number'
+  );
+}
+
 export interface UserStats {
   totalUsers: number;
   totalWorkspaces: number;