Once your Android phone is paired with the computer via DG40S, please click "Send or receive files via Bluetooth" on the computer
1. Receive files - from android to computer
(1. Click "Receive files" on the computer, stay on this page
(2. Select the target file and send via Bluetooth on the phone
2. Send files - from computer to android phone
(1. Click "Send or receive files via Bluetooth" on the computer again
(2. Select your phone
(3. Browse the target file, open it and then "Next"
(4. Click "Accept" on the phone
Note: Due to system restriction, iPhone can't transfer / exchange data with Windows PC.