Same Wi-Fi: one switch. Different cities: one code. Then it is a folder on both.
With KEIBIDROP two computers connect to each other directly and a shared folder appears on both. On the same Wi-Fi you turn on one switch and click Connect. Anywhere else you send a code once in any chat app. Files you put in the folder show up on the other computer, and a big file opens there right away because only the parts being read travel.
Open KEIBIDROP on both computers.
On both, turn on the switch under Connect. The other computer appears under Nearby devices within a few seconds.
Click Connect next to it. Done. Every click.
Press Copy my code, send it in any chat, paste the code they send back, both press Connect. It works between countries and through home routers without any setup. Every click.
Drop files in and they appear on the other side. With the one-time driver, the other computer's files show up as a normal folder on yours and open in any app. Save the other computer as a contact once and next time it is one click. Your own laptop and desktop, or you and a friend, it is the same three steps.
Yes. Mac, Windows and Linux connect to each other in any combination, and the Android app sends and receives files the same way.
No. When a direct connection is blocked, an encrypted relay carries the bytes it cannot read. Nothing to configure.