In The about this MAC- under storage- thedrive is full. The colour bar named "other" takes up 170G. I want to clean my hard drive to open up some operating space
I'd personally recommend using a tool like DaisyDisk to get a clear indication of what files are taking up the most space.
After that you could also run a tool like CleanMyMac (paid) or MacClean (free) to help you delete more hidden files like browser caches and language files.