For some reason my save can be retain after upgrading hdd from 500GB to 2TB... I just do a backup of the system (with only save game checked) and restore back after installing the 2TB. My user is the generic user1. I never sign in to psn.



I saw in their warning, they just explain if you don't log into psn, and upload the saves, you can't bring your local save to other ps4. But it said if it is within the same ps4 then it should work.



By the say I only use official backup and restore. I backup the saves using the payload also, but I never have a chance to use it. So I am not sure if you just overwrite those backup saves to the ps4 thru ftp whether it will work or not.