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.
you can try out copyparty: https://github.com/9001/copyparty
not exactly a drop in replacement, but it works on nearly every device.