Windows 8 users can find out the space occupied by using the options available as part of PC Settings. This useful when you want to clean up apps based on the maximum size taken by the apps.
Step 1: Access the Settings bar and select Change PC Settings.
Step 2: In the Change PC Settings screen, navigate to General Settings.
Step 3: Scroll down to the Available Storage section and click on View app sizes option.
Step 4: Now the App Sizes Popup will display the space used by each app starting from the maximum.
By this way you can find out the space taken by individual app on Windows 8 System.