Usb problem

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munzir Posts 1 Registration date Thursday July 10, 2014 Status Member Last seen July 10, 2014 - Jul 10, 2014 at 06:50 PM
dear sir,
i have make my pin drive bootable for window 7 after creating window i cut my flash data on hard drive, after that my pindrive showing no space file system shown unknown and no should format plz sir help what to do