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2 years agoIt’s not a messenger, but for locally frequently transferring or syncing a lot of data, I can recommend syncthing. You can use it to configure shared directories, syncthing will use the local network as available (or you can force it to) to transfer files across the devices. We use it for keeping some media, notes, password databases and documents in sync over a bunch of devices. :)
It is actually Android 10+, but I think the automatic updates only work for Android 12+ :)
I have it a try and it still has some growth ahead before it is useful in my eyes.
Edit: correction, the latest release is still Android 12+, but the next release will support 10+