when a backup from photoshop 2025 is recovered on a photoshop 2025 computer does it overwrite the files

Hi Alan.  By ‘backup’ are you referring to the ‘recovered’ files that Photoshop opens with after it has crashed, or not shut down properly, while working documents were open?  If that is the case, then if the document that is now open with ‘Recovered’ added to the file was previously saved, then the saved version is still there on your drive.

The safest thing is to save the Recovered file with a different file name to make sure you don’t overwrite the previously saved version.  Note: recovered files are only accessible from within Photoshop, and only the first time Photoshop is restarted after a crash.  You can not find recovered files directly from a drive.

If this does not cover what you are asking about, then flesh out your question with some more detail.  Especially, what you mean by ‘Backup’.