neowin[.]net/news/a-number-of-google-drive-users-have-reported-their-files-have-mysteriously-disappeared/
bleepingcomputer[.]com/news/google/google-drive-users-angry-over-losing-months-of-stored-data/
People are finding everything they had stored on Google Drive is gone, but don't check to see if your stuff is still safe using the desktop app, as Neowin writes that *may* be the cause of the problem. Google is saying don't change anything, as that might make recovery harder, though you may decide to copy your stuff somewhere else until Google gives an all clear.