brilliant, cant wait to test this out, the hdd in my iRiver died 2 days ago, so ordered a 30GB hdd to replace it. Actually it builds the iRiver player database so that the player can organize the music, it also "appears as a usb hdd on the zaurus as well, great for backups or whatever else you want, too bad iRiver doesnt produce it anymore, but good news is you can pick a 20gb up on e-bay for less than $200.00(usd), and if your hdd dies, upgrade to 30gb for another...$135.00