I launched a game last night and all of a sudden now I'm getting this message. I don't want to risk choosing either option and messing things up.

Edit: I don't see the image I attached anywhere, the dialog says "Some user files previously uploaded to GOG Galaxy Cloud conflict with files on this computer. Which location has the most correct data?

GOG Galaxy Cloud

This computer

and both say last modified 53 years ago.

1. Back up your local saves. You can find the save location by looking up the game in PCGamingWiki.
2. In GOG Galaxy, click the Extras tab for the game. Under the Cloud Saves Backup section, click the little arrow on the right side. Edit: make sure this reveals the Downloads section in the left sidebar, with the cloud saves successfully downloaded there.
3. You can now safely choose to keep the local saves when prompted. They're probably the right ones, but even if not, you have backups or both sets. The size limit is <500 KB per image and <2 MB total per post. Anything larger than that gets silently stripped out when posting. The creation/modification time couldn't be determined, so GOG Galaxy fell back to the Unix epoch.

absolutely embarrassing that this is happening in 2024.

CDProjecktRED figure your life out.