
Choose the Empty Trash Automatically option, and click Turn On.

To set up Empty Trash Automatically, you need to switch this option on in About My Mac/Storage/Manage.

It’s also worth mentioning that you can set up your Trash to empty automatically to stop trash building up and hogging your disk space. Hopefully, this will have regained you a few GB, and if that’s all you need then you’re sorted! Right-click on the Trash/Bin and choose Empty Trash/Empty Bin. The last step after you’ve found and sent all the junk to the Trash is to empty it. Or, if you take a lot of screenshots search by Kind to find the PNG files and remove the ones no longer needed. Choose Sort by Size and get rid of anything that’s large and unwanted.

Open the Finder and choose the Desktop folder. Many of us tend to use our desktops as a sort of dumping ground, and often there’s stuff on there you no longer need.
