How do I solve this problem? The storage space does not increase when I delete files. Yesterday, I deleted 250MB of files but made zero change to storage space. I have emptied the trash. I don't use Time Machine
GrandPerspective is a great app to visualize the files taking up the most space on your Mac. Next time you want to delete a file, use GP to scan your computer before and after you empty the Trash, and see what's still taking up space.