diff --git a/ste/mgr-JobPartTransferMgr.go b/ste/mgr-JobPartTransferMgr.go
index b249d3d51..ba648054b 100644
--- a/ste/mgr-JobPartTransferMgr.go
+++ b/ste/mgr-JobPartTransferMgr.go
@@ -94,6 +94,7 @@ type IJobPartTransferMgr interface {
 	GetS2SSourceBlobTokenCredential() azblob.TokenCredential
 	PropertiesToTransfer() common.SetPropertiesFlags
 	ResetSourceSize() // sets source size to 0 (made to be used by setProperties command to make number of bytes transferred = 0)
+	SuccessfulBytesTransferred() int64
 }
 
 type TransferInfo struct {
@@ -972,3 +973,7 @@ func (jptm *jobPartTransferMgr) ShouldInferContentType() bool {
 	fromTo := jptm.FromTo()
 	return fromTo.From() == common.ELocation.Local()
 }
+
+func (jptm *jobPartTransferMgr) SuccessfulBytesTransferred() int64 {
+	return atomic.LoadInt64(&jptm.atomicSuccessfulBytes)
+}
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