So i bought an 8 gig memory stick pro duo off of egay for what i thought was a steal (£21)
Turns out i was ripped off with a fake. After doin some research on the net, i discovered that over 98% of the memory sticks sold on egay are fake.
So basically keep your eyes peeled for the subtle differences between real and fake.
The workmanship on a fake chip is very shoddy. And when in a PSP will not work correctly. If you have problems with copying files and them becoming corrupt its because you most likely have a fake memory stick.
You can check in on seimple process. press triangle when the memory stick is highlighted and look at information.
If it says "Magicgate unsupported" you have yourself a fake.
It should say "Magicgate Supported".
The pic below shows my particular fake one, i have highlighted the major packaging difference.
Hope this helps anyone who is thinking of buying one! dont get one from ebay!!!