and the good news a patch to fix this has been released to Australia and Korea areas last week and to UK and Canada english users today but that release had no fix included so will be re-released soon.. US users on 31 Aug. The release will be throttled so say 5% users in that area get the fix on day 1 another 5% days 2 etc.
The above link has a way to unhide the files.
I can see why some would be panicking. 20Gb wedding photos go missing.