Go to your memorycard
Rename it from memorycard to 'Rohan.ota'
thats what u will rename ur memorycard to.
i mmediately ur memorycard will disappear and no matter how they search your phone,they can not see it again.
Then If you want it to show again,i mean if
you want your memorycard to be seen
again,then you will go and download BLUE
FTP.Its The BlueFtp that you will use to make it show again.if you have download the
blueftp,then launch it.after you have launch it,it will bring two folder out,(1)phone
(2)'Rohan.ota'.
Then scroll down to 'Rohan.ota' and click
ok.Then it will show you where to rename your memorycard.then rename your memorycard to any name you like
Note: This Trick Tested On Java Mobile