Write to SD card fails

I am using Sandisk 8GB micro SDHC card on my MileStone. The card is detected , mounted. I can read data from the SD card. But cannot write to it. There is no error when I attempt to write to the Card.It appears as if its working fine.But after umount and re-mount , the data written is gone. Even if I format it , it will restore to the previous state.

Did you try formatting the card in your pc using the card format utility? It might revive the card, but it will erase all the data on the card.


The operation system formatting utilities is not working , it says “Windows was unable to complete the format”.

Then i using the “SD Formatter 3.0 Beta” from “http://www.sdcard.org/consumers/formatter_3/” , and it says “The Memory Card is write-protected Please release the write protect switch”, but i can’t find any switch on my micro SDHC card and SD Card Reader.

I see some useful information on that web site , it says “The SD/SDHC/SDXC Cards have a “Protected Area” on the card for the SD security function. The SD Formatter does not format the “Protected Area”. Please use appropriate application software or SD host device which provides SD security function to format the “Protected Area” in the card.” 

I think my card may be wholly protected and how can i format it .

No one can help me ?

the error message is pointing out the problem,  The either the Mechanical Write Protect Switch (usually a little white tab) is in the wrong position, or the Software Write Protect feature is enabled, or last, the Memory Card has an electrical fault.

Good Luck

How do you disable software write protection in a SD card?