You can rsync from your Linux pc to your phone via SSH over port 8022 (you’ll need Termux), and schedule when the script runs with a cron job. Here’s some documentation:

https://www.baeldung.com/linux/android-rsync

I really like my Framework 16 laptop. I’ve been using it for about a year now. The modular ports and easily upgradeable design were a major selling point for me. Video workflows work well via Kdenlive and ffmpeg, but you can also install Davinci Resolve with some additional configuration. I purchased the GPU upgrade (https://frame.work/products/16-graphics-module-amd-radeon-rx-7700s) and a handful of different port modules. My only dislikes are that it can get really hot from time to time and the GPU fans are pretty loud when they kick on. A coworker of mine has a Framework 13 laptop and seemed very satisfied with it. Best of luck in your search!