LocalSend tutorial for bidirectional file transfer between Android & every other OS (including iOS)

If you need to transfer files bidirectionally over your Wi-Fi LAN between
Android and any other common consumer OS, including iOS, try this.

 *Tutorial: How to send files between Windows & iOS over the LAN using LocalSend*
 <https://www.novabbs.com/computers/article-flat.php?id=86116&group=alt.comp.os.windows-10#86116>

That tutorial was specifically written to overcome the arbitrary
file-transfer restrictions of the brain-dead toy iOS dumb-terminal
operating system; but it turns out that the method works for everything.

With this method, you can transfer files to/from Android & every other
common consumer operating system as long as they're on the same network.