Open Bluetooh menu on the computer and go to Settings. Check the option that says to make the device visible for all others in the surrounding area. Turn on Bluetooth on the phone and then pair the devices between them. This is an easy job: search for Bluetooth enabled devices on the phone and when you find the computer, tap/select Pair. On the computer, right click a file > Send to > Bluetooth devices and select your device. Confirm the operation and the file will be sent to your phone.