Check your pen drive using a card reader if it still occurs then there is a problem in your card if it is ok in another card reader then format the card and test it in your laptop if the problem still occurs then an external card would be helpfull to you.some of the card cant read in another machine due to some hardware problem.
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Check your pen drive using a card reader if it still occurs then there is a problem in your card if it is ok in another card reader then format the card and test it in your laptop if the problem still occurs then an external card would be helpfull to you.some of the card cant read in another machine due to some hardware problem.