for reasons I don’t completely understand, Resilio Sync connections seem to be quicker and more reliable
Resilio runs a “relay” server to facilitate connections where neither peer has properly set up port forwarding. Only downside of Resilio is its not open source, so you just kinda have to take their privacy policy at face value. As long as op isn’t sending something super sensitive though, it probably is no big deal.
My God if I have to listen to my mother in law brag about how good of a “deal” her $10 (made up “retail”, $26) Tommy Bahama hand towels from TJ Max were one more time…