diff --git a/pkg/filemanager/driver/remote/remote.go b/pkg/filemanager/driver/remote/remote.go
index 7aeae5d5..cc0b89fa 100644
--- a/pkg/filemanager/driver/remote/remote.go
+++ b/pkg/filemanager/driver/remote/remote.go
@@ -153,7 +153,9 @@ func (handler *Driver) Token(ctx context.Context, uploadSession *fs.UploadSessio
 	// When disk pre-allocation is disabled, concurrent chunk uploads must be 1
 	// to avoid disk fragmentation and write contention on slave storage.
 	if !handler.Policy.Settings.PreAllocate {
-		handler.Policy.Settings.ChunkConcurrency = 1
+		settings := *handler.Policy.Settings
+		settings.ChunkConcurrency = 1
+		handler.Policy.Settings = &settings
 	}
 
 	return &fs.UploadCredential{