My available storage space went down by 1GB in 6 days and i cant figure out why, i need help!

Six days ago my available storage was exactly 48.5GB . . . But now, it's down to 47.6!! And I don't know why.

I was able to delete 700+MB worth of chrome data that was made over a year ago, which made it go to 48.22GB, but just a few hours after doing that, it reduced all the way down to 48.04, and in a few minutes it went to 48.08

I did nothing in those six days except for using chrome, and I checked the app support and cache; the files only increased the chrome data by 110MB.

And the files that I deleted which made it go up by 700MB were files made a year ago, and they're still "was" a 300+MB difference in the used storage space even after those files. And currently, it sits at 48.08GB, with 420MB worth of files taking up my system storage. and while this was happening, I installed an app that was 35MB in size, but when I uninstalled it, only 10MB was released in used storage space, I made sure that the application didn;t leave any app support or cache files but I wasn;t able to find any, maybe this could be linked to my issue? I don't know.

I Did not remember installing or downloading anything except for that 35MB app, and I checked my cache and app files, but nothing increased significantly, I did notice a 150MB total change from a few folders, but none added up to 1GB, and it doesn't make sense to the 140MB change of free space after I deleted all that old chrome data.

I literally have access to 95% of everything that is taking up my storage space, and I am also aware of what is taking up that extra 5%, but I tried so hard, I did not find anything that caused that dramatic decrease in available storage space in just six days.

So is there any way I can view what has been taking up my storage space for the past six days? and what caused that decrease even after deleting some unused app data? I searched all around every single big folder on my computer in hopes of finding a change in size, but couldn't find anything.

and no, I'm not using a third-party app to view what's been using up my space recently; perhaps there is a way like a terminal or a system report to view what has been taking up my storage. Even just a folder in finder that I can view would help.