I Google around for more information regarding pendrive's support and I've encountered this Polish web site that has a HUGE list of USB brand names and it specifies which pendrive is working with ARMax, CB 9.2, SMS Player & uLaunchELF.

Question is, can I really rely on this information? Here's the link:

playstationworld.pl/lista-PD.php?letter=&page=1

I for one, never trusted foreign sites for some unexplained reason. I hope this list is correct and could assist many who'd like to purchase a pendrive for one software or more and if someone could translate it (although it's pretty much straightforward) I'll give him/her my Kudos!