Copy folder from external drive to internal get canceled

I have had a WDTV Live plus for a while, I bought the HUB and moved the live plus to another room.

I wanted to free up some space from the external usb drive so I want to copy a folder from external to internal.

The copy starts fine but later on when I go back to check the copy as been canceled?

why does the copy get canceled.

I have to disable the screen saver, if the screen saver kicks in it disables the copies.

I will disable it on large copies and re-enable once done

If someone can confirm that behavior, it should be opened up as an ISSUE. 

I copy large MKV files from my 3tb USB drive to the Hub all the time and never has the screensaver interrupted a copy operation.