I would be interested in an overview and comparison of all the available options to solve this kind of problem. Here is a list of some services I’ve used successfully in the past.

SnapDrop

- Site: https://snapdrop.net/

- Source: https://github.com/RobinLinus/snapdrop

ShareDrop

- Site: https://www.sharedrop.io/

- Source: https://github.com/szimek/sharedrop

FilePizza

- Site: https://file.pizza/

- Source: https://github.com/kern/filepizza

Wormhole

- Site: https://wormhole.app/

- Source: Closed (for now)

Croc:

- Site: https://schollz.com/blog/croc6/

- Source: https://github.com/schollz/croc

Magic Wormhole:

- Source: https://github.com/magic-wormhole/magic-wormhole

Send (A fork of Mozilla's Send):

- Site: https://send.vis.ee/

- Source: https://github.com/timvisee/send

- CLI: https://gitlab.com/timvisee/ffsend

I've personally used Snapdrop and Croc before and they're both very nice