Uninstalling Didnt regain any storage

I recently uninstalled Halo MCC from my pc. After I did that I noticed my drive size hadn’t changed at all. So there are either hidden files I cant do anything about, or it actually didn’t uninstall. Either way I do not have enough space to redownload it to see if that would help. So far there is 40gb that is unaccounted for and seemingly disappeared. Has anybody else ever had this issue or a solution or any tips would be helpful. Thank you

Any update? Did you end up fixing this issue? I am currently having the same problem.

Same issue here, need free my hdd space…