I’ve got an RMA on my Deck over a sticky button issue, so I ordered a 1TB external drive online to back it up before wiping and sending it off.

What’s the bare minimum you would recommend I back up if I just want to preserve my desktop settings, apps, and some non-steam game content (since much of that is already tied to my account)?

1. Is it just a matter of copying folders over in desktop mode or is there an official (or recommended) backup tool I should use?
2. Would Syncthing, which I use to transfer files normally, be a reliable method to use my Mac as a potential backup location?

Thank you for any advice.