Check How Much Data is on Your Mac or Windows Computer

It's helpful to know how much data is stored on your computer, particularly before starting a backup, transferring data to a new computer, or installing large applications. The step-by-step instructions below show how to find the amount of data and the amount of free space currently on your Mac or Windows computer.

Mac

1. Click the Apple icon in the top left of the toolbar
2. Click About This Mac
3. Click on the Storage tab
4. The storage size of your drive will be displayed along with the used and available space. Additional categories and the amount of data in each category will be listed underneath. Please see Used and Available Storage Space on your Mac for more information.

Windows 10

1. Click the Start menu in the bottom left of the taskbar
2. Click the Settings gear
3. Click Storage on the left side menu
4. The storage size of your drive will be displayed along with the used and available space. Additional categories and the amount of data in each category will be listed underneath.