Sometimes the filesystem on the card gets corrupted. It can happen for example if the card was ejected while a file operation on it was in progress. When that happens you might have trouble accessing some of the files, loading times for some directories in file explorer may be very slow.
You can attempt to fix it using the desktop windows' built-in chkdsk utility.
Open up command prompt (start->run->cmd.exe) and type
chkdsk /X /F <SD card drive letter>
My SD card reader is X:\ drive, so i wold use the following command:
chkdsk /X /F X:
SD card reader is recommended, but probably not necessary because it should also work with WinMo's built-in USB mass storage function or wm5torage.
Under linux you can check/fix the card's filesysterm and in some cases undelete a file using fsck.vfat or dosfsck (single tool, two possible names). Refer to its help for more details.
Now, my sd card fried itself and wouldnt for the life of itself show up in card readers, my phone, ect... i nearly gave up on it.
But then it occurred to me, when my xbox died, all i had to do was over heat it and i could get a few precious hours out of it, so taking this theory and having access to extremely hot battery backup units at my work i gave it a try.
so step 1, locate a hot surface, im talking over 100 degrees fairenhight,
step 2, place the dead sd card on top of the hot surface, i choose to put the leads up but you can put it whatever way you want.
step 3, set it and forget it! i left mine on there for 2 hours.
step 4, return the sd card into the phone, and mess with mpount/unmount sd card and BAM! if there is any hope for you, your sd card should recognize and you SHOULD be able to recover your files.
*NOTE* i could not get my sd card to get recognized directly in a card reader, it ONLY worked plugged in my phone, so experiment with this and let me know how it goes!
Found this on another thread and it completely fixed my sd card that both windows and android said needed to be formatted... all data saved!!!
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