ExclusiveCopy Data Between Two Synology NAS My Blog TrueToad - May 17, 2022 Copy Data Between Two Synology NAS using RSYNC - Recently I had a failing drive in my primary Synology NAS. While I have a redundant system I did not want to take any chances of trying to replace the failing hard drive without a full backup of the data. This is the easiest method to copy folders over to another Synology NAS.