My music files have disappeared!

Many of my music folders seem to be empty! Just random ones have songs in them. I’m so annoyed and have spent hours trying to find a reason or solution and I’m going on holiday tomorrow (with a new sony music player with no music to play!)

It seems I’m not the only person to find that files randomly disappear but I’ve been unable to find a solution. Does anyone have any tips?

I’m using a Mac which I updated to Mojave a few weeks ago - I don’t know if that’s related?

Doesn’t seem to be much support from WD about this either. Completely unacceptable.

@banners Do you have a My Cloud or a My Cloud Home?
It’s possible the hdd have bad sectors in which case always having a backup would prevent any type of data loss.