Well, I have deleted the WDSync.exe file on the hard drive and reformatted the drive to NTFS.
Now I will just use it the drag and drop files to.
I must admit, with no documentation provided re: WD Sync software, I was unsure what it actually did. Now have read up and realise it should not to be used to backup files (more to replicate files on your laptop). It sounds like some people have used the software thinking that it backs-up all files which has caused issues.
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