The games id being a folder named "bleus212"(madeup)? Is there any reason not to change it to the name of the game? I only placed games on my internal hard drive, does this id have anything to do with the placing games on an external drive?
It's the serial ID for the game, which denotes region and a number (BLES = Europe, BLUS = US). The PS2 and PS1 also used very similar number systems (SLUS and SLES) and the ELF files were even named by this number as well, with the PS3 just having EBOOT's instead.