diff --git a/Infrastructure/CloudSdk/minio/MinioService.cs b/Infrastructure/CloudSdk/minio/MinioService.cs
index b89021f..f979bbc 100644
--- a/Infrastructure/CloudSdk/minio/MinioService.cs
+++ b/Infrastructure/CloudSdk/minio/MinioService.cs
@@ -1,4 +1,5 @@
-using Microsoft.AspNetCore.Http;
+using Infrastructure.Helpers;
+using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Configuration;
 using Minio;
 using Minio.DataModel;
@@ -53,6 +54,21 @@ public class MinioService
         }
     }
 
+    public async Task<string> GetMetaObject(string objectName, string bucketName)
+    {
+        if (string.IsNullOrEmpty(bucketName))
+        {
+            bucketName = _bucketName;
+        }
+
+        var statArgs = new StatObjectArgs()
+            .WithBucket(bucketName)
+            .WithObject(objectName);
+        var meta = await _minioClient.StatObjectAsync(statArgs);
+        var md5 = meta.MetaData["md5"];
+        return md5; // 
+    }
+
     public async Task EnsureBucketExistsAsync(string bucketName)
     {
         var existsArgs = new BucketExistsArgs().WithBucket(bucketName);
@@ -165,11 +181,18 @@ public class MinioService
             using var stream = new MemoryStream();
             await file.CopyToAsync(stream);
             stream.Position = 0;
+            var md5 = Md5.CalculateStreamMd5(stream);
+            stream.Position = 0;
             var putArgs = new PutObjectArgs()
                 .WithBucket(bucketName)
                 .WithObject(objectName)
                 .WithStreamData(stream)
                 .WithObjectSize(stream.Length)
+                .WithHeaders(new Dictionary<string, string>()
+                {
+                    //x-amz-meta-md5
+                    ["X-Amz-Meta-Md5"] = md5
+                })
                 .WithContentType("application/octet-stream");
             //.WithContentType(file.ContentType);
             await _minioClient.PutObjectAsync(putArgs);