Want to transfer a file across platforms (Windows, MacOS, iOS, Android, Linux) but can't find common ground? Destiny can help. Download from
https://github.com/LeastAuthority/destiny?tab=readme-ov-file#installation
There is nothing to set. If both platforms are on the same network (i.e. phone to PC, or vice versa), simply sender run the app and pick SEND, and receiver pick RECEIVE. Then sender choose the file to send, and a passphrase is generated, easy to type in English. As soon as receiver type in the same passphrase, file transfer will start, and since it's happening at local network speed, it's almost instantaneous.
The client, using "magic-wormhole" protocol, will automatically negotiate alternative protocols if you are on different networks, through the Internet, and so on. And the traffic is encrypted. No interception. Remember, cross platform too. You can go any client to any other client. You can send the passphrase through any "normal" means: SMS, encrypted chat, email, or even call them up and tell them.
I've tested Android to PC and vice versa on local network. It works great. Previously I had to rely on Google Drive or DropBox to sync the files, and I've also purchased a "Wifi Server" where the Android app hosts a GUI that allows a browser to access the local storage. First is slow, second is a little PITA to run. This manages to be neither.
My only nitpick is you can only transfer ONE FILE AT A TIME. For each file, you have to initiate a send, and thus, a new passphrase. Not quite frictionless, but for the amount of security it provides, it's almost unbeatable.
So if you need to frequently transfer single file between your devices, this is a very simple way to do it. Worth a try, at least.