The “Cloud” is not creating the files, WD Sync program is. As explained its part of the way WD Sync works. The program keeps up to five previous versions of a file it syncs. There doesn’t appear to be a way to disable that version feature or reduce the number of versions retained within the WD Sync program. There is some possible explanation on the .WDTemp folder in particular in the following post/thread:
https://community.wd.com/t/wdtemp-folder/145676/16
For some the WD Sync program works fine, for others its nothing but problems. Again, the solution is, if you need a sync program but are having trouble with WD Sync that cannot be resolved, don’t use WD Sync use a third party program like Free File Sync (link posted above). The downside however with third party solutions is remote syncing isn’t possible or requires additional unsupported modifications via SSH or using the insecure FTP.
If one only needs a backup program use Smartware for Windows or Time Machine on Mac or use a third party backup program. There are several free third party backup programs, here are a few of them:
EaseUS Todo Backup Free: http://www.easeus.com/
Macrium Reflect Free: http://www.macrium.com/reflectfree.aspx
Paragon Backup and Recovery 14 Free: http://www.paragon-software.com/home/br-free/download.html
