When you pair 2 devices via Bluetooth on Android devices, files sharing gets really easier. Learn how to pair devices via Bluetooth on Nexus 4, and other Android phones and tablets:
1. Open "Settings"
2. Tap "Bluetooth"
3. Turn Bluetooth On
4. Tap "Search for Devices" (located at the bottom center)
5. Tap the device you want to pair, from the "Available Device" list (Make sure the other device is set to be Visible. see: How to Set Bluetooth Visible on Android)
6. Tap "Pair" or "Ok" to confirm the passkey shown on both devices.
7. Devices are Paired
** If you are trying to pair your device with a Home Theater device, you may need to enter 0000 as the password to complete paring process