If you forgot your memory card password and not able to open it on a computer, then through this tutorial you can unlock your microSD memory card.
If you are using Symbian 1st and 2nd edition phones i.e. 3600, 3620, 3650, 3660, N-Gage, N-Gage-QD,3230, 6260, 6620, 7650, 6670, 7610, 6630, 6680, 6681, 6682, N70, N72, N90 follow the below steps to unlock your memory card.
|microSD memory card unlock : Forgot Password MMC|
Download and Install FExplorer_english_117
Rename The File mmcstore.txt
Open the text file
You will find your password at the end of the text document (mmcstore.txt)