I don't why I don't have storage

My computer said to me that my disk was full, I freed up like 40gb and then a couple hours later it said again. But, I checked the app sizes and it didn't make sense, so I did the sums and I have 24.63gb storage in apps but my computer is saying 68.82gb. Do you know what could be the problem? thx https://preview.redd.it/rldpdejffzhe1.png?width=1266&format=png&auto=webp&s=9180b3045f0ddeebcebe67871f6aad080c9c0b52