I've just got a second hand MacBook from my dad which is a 2017 version with 250GB storage. I've factory reset it so theoretically it should be a completely blank slate, but for some reason I'm losing disk space already. Every couple of minutes the available space shrinks; it seems I lose 100MG every ten minutes or so. I'm currently on 231.52GB free, and it was at least 235 a few hours ago.
I know this began as soon as the computer switched on because the first thing I did was to check the storage space and I immediately noticed that it was going down. I'm not downloading anything at all from the internet, my downloads folder is completely empty.
This is really frustrating to me, not to mention making me a bit paranoid about when it's going to stop and how much space I'll have lost when it does. The whole reason I got this Mac was for the better storage as my previous one was less than half the size (120GB) and it was causing big problems. And granted it's only small chunk of the overall storage gone so far, but I'm gonna be using a lot of big files on this machine and I need all the space I can get. Does anyone know why this is happening and how to stop it? I'm wary of even downloading anything else until I get to the root of this problem.