When someone consulted me saying “I don’t really understand why, but files in Google Drive have been completely deleted, what should I do?”, I looked into it and found that if you contact Google, they might be able to restore files within a certain period.

• Source: Story of Google Drive Files Disappearing and Google Restoring Them - Kumi-log Budget×Digital Nomad Blog Living Around the World

The likely cause seems to be accidentally deleting local environment files when syncing your PC with Google Drive, but the truth is unknown.

• Selecting What to Sync with Your Computer - Drive Help

It seems good to contact Google Apps for Work Help Forum immediately when you notice the issue.

That’s all from the Gemba.