This is the easiest method for how to see storage on Mac but you can go deeper If you need a closer look at your Mac’s memory use, there are a few ways to go about it. Remember that when you move a file to the Bin, its storage space won't become available until you empty the Bin. Here’s how to check storage on Mac: Click the Apple logo in the menu bar. Compress files that you use infrequently.Move some of your files to external storage, such as iCloud Drive* or an external drive connected to your Mac.Check the Users folder on Macintosh HD for any shared files that you no longer need to share.If your Mac is set up for multiple users, remove users that you no longer want to have access to your Mac, or ask them to follow the steps in this article after logging in to their user account. Also check the Users folder on Macintosh HD for any undeleted data belonging to previously removed users.To delete emails that you've moved to the Bin, choose Mailbox > Erase Deleted Items. Delete unneeded emails in the Mail app. To delete junk mail, open Mail and choose Mailbox > Erase Junk Mail. If you prefer treemaps and want to check hard disk usage on your Mac, Disk Inventory X is your software The disk usage utility works on Mac OS X 10.3 (and.Delete unneeded files in the Downloads folder. You can open the Downloads folder from the Dock or by choosing Go > Downloads from the menu bar in the Finder.Delete unneeded media, such as music, films or podcasts, which can use a lot of storage space.