Why after updated to latest version, not able to backup

My Cloud OS 3 Personal & Network Attached Storage My Cloud
1

WD my cloud not able to backup to mybook

using USB 3.0, 

My Book 1230

Manufacturer Western Digital

Model My Book 1230

Firmware Version 1.065

2

Hello, welcome to the community.

I’m sorry to hear that you are unable to perform a backup from the My Cloud to the My Book. Do you receive an error message? What exactly does it happen?