In the notorious 2023 incident, the issue stemmed from the local database on the user's computer becoming out of sync with the server. When the client tried to reconcile the difference, it essentially panicked, discarding the newer data on the server and replacing it with the older local snapshot. This is why users saw their files "rewind" or vanish entirely.
Users have reported seeing files appear in their drives that they did not upload. This usually happens due to "Shared Drives" permissions or glitches where a file is shared with a group email address (like a workplace domain), causing it to populate in the drives of everyone in that group. google drive now you see me