[deroad]

RCan SF be or "store format"?

I would also say, that they use this format:

NP for content that you can have on the fw. (this means made by Sony)
BL from external source (an example games)

Then the region (probably IA is for those without location), an example US, JP or ES

Then the number of the "software" on the regional location. An example can be taken from the addons. When you buy some addons, you will see that you can download different packages for different APPID