WD smartware keeps copying files

Hello, be sure to have the latest Smartware update installed (2.4.1), also close any program that might be using the files that you are trying to backup. You can manually explore the backup folder to see your files, just look for the smartware.swstor folder inside the external drive. 

Smartware download

http://www.wdc.com/wdproducts/wdsmartwareupdate/