Help! My OneDrive Deleted 300GB of Files While I Was Asleep!

You can view the version history of the folders in OneDrive by right-clicking on the folder. This might show you some details around the deletions. However, always remember that while cloud storage is handy, it's important to keep on-site backups too, just in case something like this happens again. Unfortunately, you don't need direct access to a device to alter files stored in the cloud, so it’s good to be cautious!

Have you checked the Windows Event Log? If you haven't, that could also provide some insights. But, I understand it can be overwhelming to sift through. If you find it confusing, try focusing on times around when you suspect the deletions happened. Look for events that might relate to file actions or OneDrive activity.

First off, are you using a personal OneDrive or a business subscription? If it's a business account, you usually have a way to see activity logs related to deletions. For personal accounts, it might not be as straightforward, and you probably won't find detailed logs. Did you check the web version of OneDrive for any activity regarding the files? You might also want to ensure you looked thoroughly in the Recycle Bin and checked if any files were accidentally moved. More context about what you’ve explored would help us give better advice!