I was looking for a way to transfer 100 mb noise files to a second hand android phone I was given (reason for discard was cosmetic) when my fairphone 2 stopped working (battery does not hold charge) & I found croc (https://github.com/schollz/croc) e2e point2point transfers from/to computing devices. instructions to install on at least ten distros. got 7mbit upload from my desktop to mobile.