Roger
After working with my E433 for a while today, I decided I needed to clarify a few of the things I said in my previous post. Even though you could store several thousand style files on a 2 Gb flash drive, the PSR arrangers have some design limitations that must be taken into account. All of them seem to have a maximum number of files that they can handle in any given directory (folder), and this is usually somewhere between 130 and 150. The actual number varies from model to model. Sadly, the E433 does not support directories (folders), at all, when it comes to style files on the USB flash drive. They all have to be in the root directory in order for the E433 to "see" them, so you would be limited to roughly 130 styles immediately available online for loading into the five User Style slots. Of course, you could always create hundreds of directories and put hundreds of styles into each of them, but you would need a PC or laptop to move them in and out of the root directory at around 130 at a time so the E433 would recognize them. Look at it this way. Even if you stick with just the root directory and nothing more, that's still 130 to 150 additional styles that you don't have access to right now. It just seems like a horrible waste of flash drive space. And . . . now . . . for the most disappointing drawback of all. While the larger PSR's can load style files from USB flash drives almost instantaneously, this process is painstakingly s - l - o - w on the E433 - like from one to three minutes per style, and the operating system is not always good about informing you when a load is complete. So, this is not something you would want to attempt in a live setting, even if you are playing just for friends or family. I am afraid that in the time it took to load just one style ( let alone 5), you would lose most of your audience to the fridge, or the washroom, or the Blackberry, or the iPad, or the TV, or just nodding off. For my part, I have decided I will look at those five User Style slots as sort of semi-permanent pre-sets. I will probably just load them up with five of the hottest dance rhythms and just use them that way until there is some major genre change, and then I will set aside a couple of hours for reloading them with new styles.
I say this, not to discourage you in any way, but rather, to save you any frustrating surprises. I realize that these limitations will severely hamper your original plans. Don't feel too bad about your E433, we are having similar problems with "voice" file storage on Roland's new top-of-the-line Jupiter 50 and 80 synths and song file storage on their mid-range Juno-Gi synth.
Best of luck !