In the past, ThinkPads, but my next one will probably be an ARM-based one for the performance and power efficiency (e.g. Snapdragon X Elite).

Both are computers.

That’s what parentheses are for.

Folder Sync Pro - if you have a NAS or extra server, you can upload backups from your phone to there for safe offline storage. I use it to hold my photos and Tasker profiles.

Sounds like a worse version of Syncthing.