NearShare

Send and receive files between this computer and nearby Android phones,
Windows PCs, Macs and other Linux machines. NearShare speaks the Quick
Share (formerly Nearby Share) protocol itself, so the other device needs
no extra app:

- Android: Quick Share, built in
- Windows: Quick Share for Windows
- macOS: NearDrop
- Linux: NearShare

No cable, no account and no cloud. Both devices only need to be on the
same Wi-Fi network (or use Direct mode, NearShare's own temporary
hotspot). Every transfer is end-to-end encrypted and confirmed with a
4-digit PIN shown on both screens.

What you can do

- Click a nearby device, or drop files on it, to send
- Accept or decline incoming files from the window or straight from

 the notification

- Right-click a file in Files, then Open With > NearShare
- Start at login, hidden, so the computer is always ready to receive
- Script it: nearshare send photo.jpg, nearshare toggle,

 nearshare status

After installing: two optional commands

Two features use interfaces that snapd does not connect by itself:

 sudo snap connect nearshare:bluez

 sudo snap connect nearshare:network-manager

bluez lets a phone find this computer without Quick Share being open
on the phone first. network-manager enables Direct mode. Sending and
receiving on a shared Wi-Fi network work without either, and the app
shows these commands with a copy button until they are connected.

Right-click "Send with NearShare" as a top-level menu item

A confined snap cannot add an extension to Files, so the snap offers
Open With instead. For the top-level menu item, use the .deb:

 sudo add-apt-repository ppa:dhiva-labs/apps

 sudo apt install nearshare

NearShare is an independent project, not affiliated with Google or
Samsung.