I installed the Linux client a few weeks ago, but I didn’t have time to properly set it all up. Every time I rebooted however it kept prompting me to set it up. So one day I did, except I accidentally told it to sync an existing folder with important files. No big deal, I figured. It would just make the folder a lot more crowded.
But later when I went to go retrieve some of those files they were all gone! Replaced by the contents of my gdrive.
Thankfully I can recover most of the files from backups and emails, but this seems to be a major design flaw or bug.