Yu should use Harddrives, Addharddrives and if it's a harddrive and it is for the title of this discussion, you need to check read&write option, as well.
But very first step might be the XP part. You should make sure that XP recognizes your drive. You can solve this through add hardware wizard, but never and ever format it on XP, otwerwise you will lose your data.
Take it easy..not a big deal..
