MyBook Essential USB2.0 2TB stops spinning every now and then

I backupped a lot of video files and noticed than sometimes the copy process paused for let’s say 30 seconds and then resumed with no errors. Today, while watching a movie with the WDTV Live, the movie freezed for some 20-30 seconds, then fast forwarded and resumed normally. The drive mounts the 2.018 firmware (I can’t update, same problem as here http://community.wdc.com/t5/My-Book-for-PC/My-Book-Essential-Firmware-update-problem/td-p/376681/) Any ideas?

Hello, test the MB using DLG.

http://wdc.custhelp.com/app/answers/detail/a_id/940/session/L3RpbWUvMTMzMzg5OTI4Mi9zaWQvMWR5NU43Vms%3D

Already did that: no surface errors.