I built a little app for myself - I'm calling it Beamhole - where I can simply drag and drop a file on the Beamhole icon, and it will turn up on the other device. (Or you can right-click -> Send, or type a CLI command.)
Your files won't be uploaded to the cloud, everything is done peer-to-peer and encrypted during transit.
Window and Mac only for now, but perhaps Android, iOS, Linux, etc if this is useful to more people.
Before I keep coding, I want to validate this solves an actual problem.
If you like the idea, please fill out the survey here: https://bit.ly/beamhole_beta
Thanks!