diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/GetCacheBundleSizeOperation.cs b/Assets/YooAsset/Samples~/Extension Sample/Runtime/GetCacheBundleSizeOperation.cs
new file mode 100644
index 00000000..e5cb9c08
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/GetCacheBundleSizeOperation.cs	
@@ -0,0 +1,70 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.IO;
+using YooAsset;
+
+/// <summary>
+/// 获取沙盒目录里缓存文件大小
+/// </summary>
+public class GetCacheBundleSizeOperation : GameAsyncOperation
+{
+    private enum ESteps
+    {
+        None,
+        GetCacheFiles,
+        Done,
+    }
+
+    private readonly string _packageName;
+    private ESteps _steps = ESteps.None;
+
+    /// <summary>
+    /// 总大小（单位：字节）
+    /// </summary>
+    public long TotalSize = 0;
+
+
+    public GetCacheBundleSizeOperation(string packageName)
+    {
+        _packageName = packageName;
+    }
+    protected override void OnStart()
+    {
+        _steps = ESteps.GetCacheFiles;
+    }
+    protected override void OnUpdate()
+    {
+        if (_steps == ESteps.None || _steps == ESteps.Done)
+            return;
+
+        if (_steps == ESteps.GetCacheFiles)
+        {
+            long totalSize = 0;
+            string directoryRoot = GetCacheDirectoryRoot();
+            var directoryInfo = new DirectoryInfo(directoryRoot);
+            if (directoryInfo.Exists)
+            {
+                FileInfo[] fileInfos = directoryInfo.GetFiles("*", SearchOption.AllDirectories);
+                foreach (FileInfo fileInfo in fileInfos)
+                {
+                    totalSize += fileInfo.Length;
+                }
+            }
+
+            TotalSize = totalSize;
+            _steps = ESteps.Done;
+            Status = EOperationStatus.Succeed;
+        }
+    }
+    protected override void OnAbort()
+    {
+    }
+
+    private string GetCacheDirectoryRoot()
+    {
+        string rootDirectory = YooAssetSettingsData.GetYooMobileCacheRoot();
+        string packageRoot = PathUtility.Combine(rootDirectory, _packageName);
+        return PathUtility.Combine(packageRoot, DefaultCacheFileSystemDefine.SaveFilesFolderName);
+    }
+}
\ No newline at end of file
diff --git a/Assets/YooAsset/Samples~/Extension Sample/Runtime/GetCacheBundleSizeOperation.cs.meta b/Assets/YooAsset/Samples~/Extension Sample/Runtime/GetCacheBundleSizeOperation.cs.meta
new file mode 100644
index 00000000..28716555
--- /dev/null
+++ b/Assets/YooAsset/Samples~/Extension Sample/Runtime/GetCacheBundleSizeOperation.cs.meta	
@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8790bf5eb17db6843b696018a2b1ce6a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: