Does the "Server Backup Function" create one save per platform or it only makes a single save that can be shared by all 4 platforms?.

It is important to me because I play on both Windows and the PlayStation 5.

Currently I have a backup from Windows which I then downloaded on the PS4 version, will that backup be overwritten if I upload a new one from the PS4 version of the game to then be used on the PS5 version?.