After changing the ARCHOS system mode XP still could not recognize HD. Here is a link to more info on this subject in this forum <a href="http://www.oesf.org/forums/index.php?showtopic=16564.Looks">http://www.oesf.org/forums/index.php?showtopic=16564.Looks</a> like the only recourse to get HD working is to reformat.