Lost connectivity to my book when upgraded to u-verse

Upgraded to u-verse and lost connectivity to my book. When plugged into u-verse gateway can’t see drive at all???

Hello and welcome to the WD Community.

Were you using the drive with a static ip or a DHCP?
If it was a static IP, you might need to update the information on the drive since you did changes to your network.

Try resetting the unit using the button on the back of the unit.