To check if your memory stick is real or fake,
simply have the memory stick inserted into the psp, proceed to
either 'Photos' or 'Music' droplist and go to your memory stick.
Press the triangle button and go under information. There should
write MagicGate: Supported.
So the steps are simply:
PSP Home >>> Go under "Photos" or
"Music" droplist >>> Go to your memory
stick >>> Press triangle >>> Go
under information >>> MagicGate should be
stated "Supported"
Fope this would help 