A question of speed and security. MCH users may notice that not only does it take a long time to copy files to the ‘Private User Space’, it also takes a long time to delete files from it using the desktop Windows Explorer (KDDFS running on the desktop must be checking with other online shared mobile devices to be sure the file is not locked in usage) - on the order of about 3 files deletions per second. That could be a problem if you are working with thousands or tens of thousands of files.
The credit goes to a user named Gas920 who suggested using the mobile app (but it also works as fast with the web app in a browser) to delete the files. The deletion of a folder with thousands of files from the mobile app is nearly instant but the files are also irretrievable once deleted. Because WD MCH is a one way sync, from mobile ->desktop KDDFS, it doesn’t check if such files are in use on the desktop and in fact the mobile app will delete files that was opened on the desktop after they have been subsequently closed on the desktop without giving a warning on the mobile app that files were opened for editing.
