Instructions
Select the "Game" tab from the PlayStation 3's main menu.
Select "Game Data Utility." A list of each game's installation files, patch files and downloadable content files are displayed in alphabetical order.
Press the "Triangle" button on your PlayStation 3 controller on any game file and select "Information." Installation files are not labeled as such and the only way to recognize them is by the size of the file. Any file over 1 GB is an installation file. For example, "Marvel Vs Capcom 3's" installation file is 1.4 GB.
Press "Circle" to exit back to the game file.
Press "Triangle" to access the game file's menu again and select "Delete." The installation file is deleted.