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Question: i have prolem with formating and plugin in pc

i have one archos gmini xs202 and now have show one in it. when i turn on archos show somthing that read"Read access error!Can't read format hard disc"afeter i push button that is for tunrn on and after show one opcion that read format i push ok and but i cant format becxause not started somtimes don but not everytime
And second problem is that i cant plug in my pc i cant he cant find in my pc what i should do for it please help meee