Sudden unexplained low disk space

I started getting some errors with updating about not enough free space and i noticed that dolphin all of the sudden reports only 9gb of free space

the strange thing is i cant find what is using up all my space. my home directory is only 1tb and i have a 2tb disk. there's no way bazzite itslef could be using the remaining 1tb?
Solution
If you have btrfs snapshots, those will mess up available space as well I think.
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