How to unlock kingston 8gb sdc4/8gb msd card please reply

The MP66 can read microSD cards. Your 8GB card is actually a microSDHC card and will not work with the MP66. You need to use SD and microSD cards, 2GB and smaller.

Try switching the button back and forth located on one side of the card several times to unlock the the sd card, sometimes switch contacts become dirty.

click start control panel administrative tools computer management disk management right click on your drive select properties click tools you should see click check now click start two boxes

automatically fix files and scan for and attempt recovery of bad sectors place then a tick in both boxes then select check now start

you might tick one box then return after its finished the first repair then return and tick the second box you should not do anything while the chkdsk utility is in progress any input may damage this drive

I found that you get best results by ticking one box then returning after it has finished then tick the other box

hope this helps

Unprotect the card. SD cards have a slide switch along one edge. The position farthest from the metal contacts locks the card, protecting it from writes. The position nearest the contacts unlocks the card.

mini-SD card. Here is a 4gb one on amazon for $7.99 (your device can take up to an 8gb card but make sure you get a MINI SD and not a regular SD.
http://www.amazon.com/Kingston-microSDHC-Memory-SDC4-4GB/dp/B000VX6XL6/ref=sr_1_2?ie=UTF8&qid=1298999885&sr=8-2

There is a switch on the side of the card, Flip it one way and it's locked and write protected and the other way is unlocked.

It has malfunctioned.
Kingston will replace it, under warranty, but all your data is, sadly, "gone".

The 'FAT' file-system uses 16-bit arithmetic, and thus is limited to about 2GB in size.
The 'FAT32' file-system uses 32-bit arithmetic, and thus can easily format an 8GB device.

So, be sure to choose 'FAT32'.

Also:
Click Start
Right-mouse click My Computer
Choose Manage
Click Storage
Click Disk Management (local)
Does the card show a 1.87GB "partition", plus 6.13GB of "unused" space?
If so, then delete that "small" partition, and then create a new partition that "spans" the entire 8GB.
Then, FORMAT that partition.

need more information to tell you what is wrong.
but there is a possibility you didnt stop the device before removing it last time you used it.
try replacing it if it is still inside warranty

how to solve the problem