File with a .PUP extension contains data necessary for an update of a Sony PS3 game console – for instance, a security patch, additional system functionalities or error corrections. File can be downloaded on the console via Internet or it can be inserted through an external data storage into /PS3?UPDATE directory.

PUP files are usually named: PS3UPDATE.PUP. Update of the console can be performed by choosing the System Update option from the main menu of the console. Due to the fact that it is a data package, it can be unpacked for instance in Windows system with a proper tool – PUP Extrator. Sony does not advise installing updates which do not originate from the producer because it may harm the console or breach conditions of the warrantee.