AmazonS3Client s3Client = new AmazonS3Client(RegionEndpoint.EUCentral1);
                    var folderKey = savePath + title;
                    PutObjectRequest req = new PutObjectRequest();
                    req.BucketName = bucket;
                    req.Key = folderKey;
                    req.FilePath = openPath;

                    PutObjectResponse res = s3Client.PutObject(req);

req.MyAttribute = Guid.NewGuid();