This indicates that the file is a large archive containing multiple items. "Mega-packs" were popular in the torrenting and homebrew communities as a way to download an entire library of games at once rather than searching for them individually.
This signifies the core content of the pack: 184 full games . PSP MEGA-PACK -184 ISO-CSO 73 -Minis-- -5.00m33-6-l UPD
A PSP mega-pack like this would likely include: This indicates that the file is a large