diff --git a/frontend/admin-web/src/hooks/useSnapshotPolling.ts b/frontend/admin-web/src/hooks/useSnapshotPolling.ts
index 1c6031a2..ab6a65f8 100644
--- a/frontend/admin-web/src/hooks/useSnapshotPolling.ts
+++ b/frontend/admin-web/src/hooks/useSnapshotPolling.ts
@@ -4,10 +4,19 @@ import { useEffect, useState, useRef, useCallback } from 'react';
 import { snapshotApi } from '@/infrastructure/api/snapshot.api';
 import type { BackupTarget, SnapshotTask } from '@/types/snapshot.types';
 
+function formatBytes(bytes: string | number): string {
+  const b = typeof bytes === 'string' ? parseInt(bytes, 10) : bytes;
+  if (!b || b === 0) return '0 B';
+  const units = ['B', 'KB', 'MB', 'GB', 'TB'];
+  const i = Math.floor(Math.log(b) / Math.log(1024));
+  return `${(b / Math.pow(1024, i)).toFixed(2)} ${units[i]}`;
+}
+
 interface TargetProgress {
   target: BackupTarget;
   percent: number;
   message: string;
+  fileSize: string;
   status: 'pending' | 'running' | 'completed' | 'failed';
 }
 
@@ -39,14 +48,16 @@ export function useSnapshotPolling(taskId: string | null): UseSnapshotPollingRet
         COMPLETED: 'completed',
         FAILED: 'failed',
       };
+      const sizeStr = d.fileSize && parseInt(d.fileSize, 10) > 0 ? formatBytes(d.fileSize) : '';
       next.set(d.target, {
         target: d.target,
         percent: d.status === 'COMPLETED' ? 100 : d.progress,
+        fileSize: sizeStr,
         message:
           d.error
             ? d.error
             : d.status === 'COMPLETED'
-              ? '完成'
+              ? (sizeStr ? `完成 (${sizeStr})` : '完成')
               : d.status === 'RUNNING'
                 ? (d.progressMsg || `备份中... ${d.progress.toFixed(1)}%`)
                 : '等待中',
diff --git a/frontend/mining-admin-web/src/lib/hooks/useSnapshotPolling.ts b/frontend/mining-admin-web/src/lib/hooks/useSnapshotPolling.ts
index 17826962..91c6cb68 100644
--- a/frontend/mining-admin-web/src/lib/hooks/useSnapshotPolling.ts
+++ b/frontend/mining-admin-web/src/lib/hooks/useSnapshotPolling.ts
@@ -4,10 +4,19 @@ import { useEffect, useState, useRef, useCallback } from 'react';
 import { snapshotApi } from '@/lib/api/snapshot.api';
 import type { BackupTarget, SnapshotTask } from '@/types/snapshot.types';
 
+function formatBytes(bytes: string | number): string {
+  const b = typeof bytes === 'string' ? parseInt(bytes, 10) : bytes;
+  if (!b || b === 0) return '0 B';
+  const units = ['B', 'KB', 'MB', 'GB', 'TB'];
+  const i = Math.floor(Math.log(b) / Math.log(1024));
+  return `${(b / Math.pow(1024, i)).toFixed(2)} ${units[i]}`;
+}
+
 interface TargetProgress {
   target: BackupTarget;
   percent: number;
   message: string;
+  fileSize: string;
   status: 'pending' | 'running' | 'completed' | 'failed';
 }
 
@@ -39,14 +48,16 @@ export function useSnapshotPolling(taskId: string | null): UseSnapshotPollingRet
         COMPLETED: 'completed',
         FAILED: 'failed',
       };
+      const sizeStr = d.fileSize && parseInt(d.fileSize, 10) > 0 ? formatBytes(d.fileSize) : '';
       next.set(d.target, {
         target: d.target,
         percent: d.status === 'COMPLETED' ? 100 : d.progress,
+        fileSize: sizeStr,
         message:
           d.error
             ? d.error
             : d.status === 'COMPLETED'
-              ? '完成'
+              ? (sizeStr ? `完成 (${sizeStr})` : '完成')
               : d.status === 'RUNNING'
                 ? (d.progressMsg || `备份中... ${d.progress.toFixed(1)}%`)
                 : '等待中',