I have the Rio One (I used to have the original Rio, the PMP300, which is the parallel-fed version of the RIO One). I think this is what BJ is talking about.

Anyways, it's fine. Stick a cheap SM card in there (128MB) and you get 160 megs of space. TO access it, Windows treats it as a USB drive, so just move the songs over like you would to any other directory in Windows.

My only problem with it, is it's display. You cannot actually see what’s playing, as it uses numbers to distinguish tracks (First MP3 is track 1, second track 2, etc) much like CD players. Also, the "Random" function is crummy. The player takes one of three different track orders, meaning the only way to truly end up with a different track order every time, would be to remove all the songs from the player, and re-load them in a different order.

On the other hand, it’s a cheap player (I got mine for free, just for buying Windows XP Home upgrade edition, back the day it was released) and you could easily find it for under $50 at many stores.

It’s also rather small, and lasts for hours on end on only 1 AA battery.