Motorola A780 Owner's Manual page 145

Alternatively, you can use a
Motorola-Original USB cable to connect
your phone and PC. Open the
protective cover on the phone and plug
the USB cable into the USB connector
port on the phone as shown. Plug the
other end of the cable into the USB port
on the PC.
Note: Not all devices are compatible with a cable connection.
Check your PC to determine the type of cable you need.
To synchronize data between your phone and PC, select the
Sync option from the Motorola mobile PhoneTools software
running on the PC.
The Motorola mobile PhoneTools software notifies you when
data synchronization is complete. If synchronization is not
successful, Motorola mobile PhoneTools notifies you that the
synchronization attempt failed.
Synchronizing Phone Information 145