[chbot] Unlocking a microSDHC or SDXC card

[Trevor Wignall]

The most recent failure is an ADATA 64GB SDXC card, which is Read-Only. I
have tried several SD to microSD card adaptors and a USB microSD card
reader, and attempts to delete the files on this card look like they
succeed, but the files are still accessible afterwards. (It does lock up
the Windows 10 "Eject Disk" process though.) This card has been in use in
the Samsung phone for over a year, and the phone is still happily working
with a new card.
Other cards were 32GB and are a Lexar and another ADATA, both of which are
older still and bricked, i.e. the files or folders are not accessible at
all. Use of the USB reader to read the 32GB ATADA card results in a message
to "Please insert a disk into USB drive E:", followed by a message saying
the disk needs to be formatted (which doesn't complete) while use of a card
size adaptor does not result in any recognition of the card, i.e. no drive
letter is offered.nor is there any "new device" chime. The Lexar card gives
a similar result except that Windows 10 was unable to even determine its
size.
Now that I have a USB microSD card reader, I might give a Raspberry Pi a
go, and see what happens.
Cheers
Trevor

On Thu, Jan 17, 2019 at 9:32 AM Henri Shustak <henri.shustak at gmail.com>
wrote:

> Hello,
>
> I am no aware of a software / hardware lock on a microSD card that is
> accessable. If this exists please someone let me know. Fascinating.
>
> Is it possible it was somehow damaged by the phone / another device?
> Sometimes when solid state devices fail the controller will go into a
> locked state so that you can pull the data off the device. It could be that
> something happened and they had problems the controller figured was bad
> enough to look the device. I do know that some really high end malware is
> capable of getting into HDD / SSD controller firmware so I suppose it could
> be possible to do this to the firmware on an microSD card (never heard of
> that).
>
> Hopefully someone will have better luck. What are these microSD cards
> branded and did you purchase them from a reputable supplier? If they are
> under warranty, you could just get them replaced.
>
> Hope that helps.
> H
>
> http://www.htrax.xyz
> New 2018 dace track released. My first dance track.
>
>
>
> > On 14/01/2019, at 2:20 PM, Trevor Wignall <zl3adz at gmail.com> wrote:
> >
> > Does anyone have any tips or special means to unlock a micro SD memory
> card which has been corrupted by a Samsung Android phone? I have tried a
> number of methods including trying to reformat them in a camera, using a
> Hard Disk Low Level Formatting Tool, using AOMEI Partition Assistant, and
> using SD Card Formatter. Nothing seems to be able to change the card's
> contents. I have two cards, one of which (64GB SDXC card) is readable, even
> after all of the reformatting attempts. The other (32GB SDHC card) is more
> totally bricked. I am not worried about the contents of these cards, just
> after a way to allow these cards to be reused.
> > Any help welcome.
> > Thanks
> > Trevor
> >
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