The card was altered by the xbox after trying it with a usb-xbox adaptor, it reads as 50,000+ blocks free but can't be read by XP now, using the ozxexplorer. Is there another way to read it, maybe using linux?

Topic got cut off, the continuation was "by the xbox".

once the xbox formats it (by plugging it in) you cant use it on your computer unless you use action replay. i dont know about linux though.