Because Bluetooth is sooooo slow yawn
Edit: And I already tried OTG. Its slow as fuck because of the USB 2.0 bottleneck makes it take 3 hours whereas Quickshare would’ve taken like, idk maybe 15 minutes or less. Ironically wireless is faster, but I also need it to work for non-certified / custom roms.
Are you sharing files between the same devices often? Then syncthing might be useful here. You can set it up to keep a local folder in sync between multiple devices using you local wifi. If you are sharing to new devices frequently, then it’s too much to setup for your use case.