A few days ago I noticed I couldn't copy music to my mounted 32GB SanDisk MicroSDHC in my Android phone running 2.2. This was odd because I was able to before, and hadn't removed the MicroSD between when it was and wasn't working.
So I backed up the data on it (reading is still fine) and attempted to format it from my phone. A few seconds after unmounting and pressing the "Erase all data" button it would mount the SD again, with all files still on it.
After reading about an issue with formatting 32GB+ SDs on Android I plugged it into my Windows 7 32 bit PC with an integral card reader (it has a slot for MicroSD) and attempted a format with Windows Explorer and SDFormatter V3. Windows Explorer would claim to be "unable to complete the format", and SDFormatter accused the card of being write protected and told me to release the write protection switch. Obviously there wasn't one on the MicroSD card or the reader.
After searching around some sites told people to use an SDAdapter with the lock switch off, which I tried with the same results. I tried it will the lock switch both on and off, and even changing the switch while the MicroSD was out then putting it in after.
As a last resort I navigated to the following registry keys and changed WriteProtect to 0 on each:
[code]HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\StorageDevicePolicies
HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Control\StorageDevicePolicies
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StorageDevicePolicies[/code]
Then I rebooted and tried all the combinations above again. Still get a write protect error.
Surely if the write protection is just software (as there is no switch on a MicroSD) there will be a program that just ignores the write protection and formats it anyway?
Please help.
[editline]3rd May 2011[/editline]
It seems my phone can still write to it just to mock me. I'll try it on Linux tomorrow if no one knows of a solution.
My phone can't actually write to it - any changes it makes get undone after a while.
Is there no way to save it?
Can you see any files on it? Does it have the default name?
I can read from it fine on both my phone and PC. As far as I remember it has the same name as it did before this started happening.
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