It is interesting that imgur.com/B7swTLU shows only 4.8 GB being used.

as seen in a screenshot the app is not showing all directories

Can you install filelight sudo apt install filelight (it is a similar app) and check if the same behavior also occurs there?

same thing is there command that can do that

show bottom of output of running du -m / | sort -n | tail -88 which will display the 88 biggest directories

to properly format a copy and paste into your question you need 4 spaces in front of each line so to do this open up an editor and paste output into a new edit session ... highlight the text you just pasted while still in editor then hit tab key then copy and paste that into your question

@ScottStensland 4 spaces in front of each line no no no, please don't tell people to do it this way. Large pastes should not be manipulated. Adding characters to every single line is 1) too much work; 2) it adds ambiguity to the pasted content by manipulating it; and 3) is hard to fix. Please instruct people to use code blocks with fences. A new line with three back ticks should be added both before and after the pasted block. It would be better for them to not add formatting at all, rather than manipulate text inside the pate

Something seems to be horribly wrong with your system. Your /-partition should not be mounted on several mountpoints like /home, /root, /var and /.snapshots.

OP can you tell us what you've done on the device leading up to this problem's onset? Specifically, what have you done in regards to running commands in your terminal, whether or not you thought you were installing an application, mounting some other device, etc.

I just have one other drive of 1tb that is not mounted I have not done anything just installed games but not that big the system is just few weeks old and I have done nothing in terminal

I thing the /.shapshots its at fault here what is that folder

league of legend - lutris, Scorn - bottles, deltarune - steam, dusk - steam

two most resent games that I installed that could cause problem are legue of legends I installed from lutris today I installed lutris with flathub and scorn with bottles I didnt follow any guide because I installed game threw lutris before and the wasn't tutorial on scorn I just did stuff from my own knowledge and memory

It looks like at some point you made some changes to how system directories are mounted. It would be important to know how you did that. Unfortunately even if you can determine the cause, there may not be a viable solution other than a system reinstall. This situation could be analogous to mixing together two different colours of sand. Very easy to do, very difficult to reverse.

I don't even know how to change mounting points

.snapsots are the problem but I dont know how to fix it

We need to know how things were changed to know how to undo it. So this is something you'll need to use your detective skills to figure out and tell us. You're the expert when it comes to the history of actions on your device so we have to rely on you for the completeness and accuracy of that information. In this area, you have all of the knowledge where we have none. This is why a lot of people keep notes/documentation of what they do in the terminal. Now you say snapshots are the problem? This is new. How did you determine that?

its the biggest file in / I cant even see how big it is I don't have permission

yup .snapshots are definitely the problem how do I delete them without breaking the system any further

can you help me delete .snapshots

You can't delete /.snapshot since it is a mountpoint for your system-partition which should not be the case. We don't know what happened to your system, looks like something went horribly wrong. I suggest you reinstall the OS.