my problem nokia n91

actually i and my friend went to buy a phone?.we were having 2 choice?N91 and NOKIA 9300i?we first went for N91?but what happened was that?ven v on d phn it was alright but ven we entered in d camera is said dat?hard drive not accessible?sumthin of dat nature?.den v exited and entered messaging option?where we save messages?it was on phone memory and d other option was ?hardware unavailable??den in d menu option memory details?it was only giving the option of phone memory and not of Hardware drive?.wat is d reason???i Will wnt to buy N91?.plz and plz help me?.i am very much worried?plz help me?.i wil be very gr8ful?thank alot for dis ur awesome site?.