clear. pendrive that happens when you are about to die. or for any reason is wrong formatted. or wrongly spent to move it when I was copying data. I recommend that you clean the contacts of electrical and computer pendrive (I mean the usb) with a box of matches. because the wood has the toughness necessary to reach those places. do not do it with the side of phosphorus which brushed the heads. if not with the clean part of the wood. which has no role.,
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