

I’ve been using FolderSync. It let’s you sync to/from a remote server through a bunch of different protocols like SMB, SFTP, and WebDAV. You can schedule it to run automatically.
I haven’t tried it myself, but I think there is a way you can get Tasker to run scripts in Termux. You could set up your own rsync scripts that way.
Have you tried increasing your first layer extrusion width? A wider first layer will squish the filament into the build plate more, which might help. I use a 140% first layer width.