Exterior drive is empty but it says it nonetheless has stuff on it : xboxone

I’ve simply cleared out an exterior drive to make use of it for one thing else, however it nonetheless reveals it’s received 2.9gb of one thing on it regardless of saying there’s no video games or apps. There’s nothing within the leftover addons part, and there’s nothing within the video seize part (there’s a number of “On this Xbox console”, however I’m guessing that’s nothing to do with an exterior drive, plus solely 2 minutes of video which certainly isn’t going to be 3gbs). Is it simply cache or one thing like that? As you’ll be able to see from the pic it’s an SSHD if that makes any distinction?

I’m guessing it’s nothing necessary, simply want to know earlier than I reformat it for one thing else