I bought an SC1000 Sport Lyra and am only able to use about half the drive. It will no longer allow me to transfer songs onto it, even though there's at least that half the drive free. I'm using it on a Windows XP SP 2 Dell computer.
So far I haven't found anything similar and after using a regular Lyra for a couple of years I thought I'd upgrade to the bigger sport model. Now I wish I hadn't.