Help. So I'm an idiot and hadn't backed my computer up yet (which I know you told me to do).. and somehow when I opened my computer today after not using it for a week, every single file on it has disappeared/been deleted. My grandpa recently took my old laptop, which didn't have any of the files from my current laptop on it and has been deleting files and clearing it out so he can use it. I don't know if it's related but I'm not sure how it could be since none of the files deleted were on it. But I'm wondering if you can tell me if there's any chance of getting them back or not.
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Often people accidentally log into the Guest account and since that account is empty, they think all their data is gone. Hopefully that's all that's going on. To check to see if you're in the guest account, go to the black apple at the top right corner of your screen, click on the black apple. If you see "Log out of Guest" at the bottom, you'll know you're in the wrong account. If you see your actual name instead, then things are a little more serious.

If your Grandfather took a computer that was logged in to your iCloud or Dropbox account and you kept all of your documents in your iCloud drive or dropbox, then there is a possibility that him deleting files could also cause the files to fall off of your own computer. We may still be able to recover them but we would want to act quickly. Dropbox only keeps deleted items for 30 days.

There is also another completely reasonable possibility that the files may just be in a folder we aren't aware of. Either way, I feel pretty confident that we can recover what you're looking for. But we would need to move sooner rather than later on that.