Files on my hard drive are not showing up. Sometimes they flash for a second before disappearing again. Mine is a WD elements 1TB hard drive that has been formatted to ExFAT for mac. No problems prior to this.

So the files on my hard drive just disappeared, the space is still occupied, but they are not listed. The disk cannot be unmounted for some reason. And I did not hide any files.

Reinstall the WD HDD in a non WD enclosure.  Any difference?
Also look at these links:
http://www.macrumors.com/2013/10/31/western-digital-warns-external-hard-drive-cu stomers-over-mavericks-data-loss/
http://www.macrumors.com/2013/11/26/western-digital-releases-new-hard-drive-soft ware-after-mavericks-data-loss/
Ciao.

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