-psp- Little Big Planet-cso----timethief- Access

The .ISO is a full, raw rip of a UMD. The .CSO is a . Using tools like Ciso or YACC , scene groups could shrink a 1.6 GB UMD down to 800 MB or less by lowering audio quality or using “null compression” on dummy data.

on the PlayStation Portable (PSP), likely distributed or ripped by a classic scene group or user named " -PSP- Little Big Planet-CSO----TIMETHIEF-