Android phone to Linux box file/whatever transfer: what a PITA it's been -- but KDE Connect is just great! Wow!
Not even running KDE, I'm running Sway. I've barely set it up and it does useful things.
From phone, "send file" dumps it in Linux ~/Downloads by default. GOOD ENOUGH to solve 90%.
And surprise to me, transfer clipboard is incredibly useful! Someone texts me a url... Select/copy, click 'send clipboard ', paste right into browser!
Syncthing... Far too complicated. Mercer got it to stay working. All this full over automaticity, too smart for its own good. And unreliable. Phone side config baffling.
KDE Connect ftw!