Is it possible to recover overwritten data from pen drive ?.

we have a 8 GB pen drive and we also over written data to the same drive in many times . is it possible to recover data form the pen drive before over written stage ?.
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It's near impossible if it's REALLY overwritten. If your drive is 8GB and you really have written it almost with 8GB of different data multiple times, it's definitely a lost cause. If you use something like Recuva (free software), and it shows it's not retrievable anymore, it's actually already a lost cause. It will take thousands of bucks to even attempt at restoring the data. Even the best scientific minds and lab geniuses couldn't retrieve anything useful though.

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You can scan the usb stick with testdisk/photorec. But it is highly unlikely that you will be able to recover anything.
the best i know is GDB :

but as said - chances on recovery are very low - but it won't hurt runningn GDB, and see what it finds (that's still free)  -only saving what is found has to be payed for
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