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HOWTO: Repair A Corrupted MobyMemory Card

Correct Treatment of your MobyMemory Card:

Physically, memory cards are quite fragile pieces of high technology, susceptible to damage from various silly things like excessive heat, condensation, strong magnetic fields, physical damage from rough handling and/or bending! (similar to most electronic devices then..)

Given the natue of mobile memory card products, they are constantly being taken in and out of some form of interface with a mobile phone, a camera, a laptop, or desktop PC, or a separate memory card reader. The number of different devices they have to be able to interact with is in the thousands.

It is not too surprisingly, then that sometimes the state of the file system on the memory card can get damaged.

This may happen for a number of different reasons, including:

  • removing the card from a device whilst an application is trying to read/write to it.. (Just be patient…)
  • battery drain on a device whilst in use meaning an insufficent voltage failure whilst writing to the card.
  • a poor implementation of the MMC standard on the device using the card
  • poor connectivity software drivers on the device or the Windows PC/Mac
  • physical damage like card or device being dropped, bent, getting wet etc…
  • lots of others i am sure..

As often as not, the problem is not terminal for your memory card, but just a software issue ( or in physical terms, it could be called “a temporary disalignment of the all the bits and bytes on the card”).

The fix for this problem is the same as for any other file storage device (like a floppy or hard drive) with corrupt or invalid file system, namely; re-format the file system.

Re-Formatting your MobyMemory MMC Card:

It is possible that your mobile will offer you the option of formatting the memory card if it is found to be invalid. (However, the likes of Nokia nGage, Nokia 6600, and Siemens Sx1 often just prefer to reject the media as corrupted).

In that case, to format the card, you will need access to one or more of the following:

  • A Windows PC or Mac.
  • A separate multi-format memory card reader (verify that it is compatible with the MultiMediaCard -MMC- standard).
  • (This can come in USB or PCMCIA flavours. If USB, try and ensutre it is a USB2 device.
  • Alternatively, many of the newest laptop and desktop PCs now come with integrated Multi-format memory card readers.

If you are using a separate memory card reader, then connect it up to your PC, and let windows recgnize the device through plug-and-play.

Now you can insert your MobyMemory card into the appropriate slot in the memory card reader. (Please note that because the MMC card is pretty much symmetrical it is very easy to insert it upside-down in the slot).

Open up [Windows Explorer] (or the equivalent for MAC users..sorry not well-versed in OS X).

There should be at least one icon visible for a [Removable Drive] in the list of available drives. (in fact, there is often a list of about 5 or 6 Removable drives, one for each of the different Memory card formats that your reader is compatible with).

Find the drive that is mapped to the MMC card by clicking on each in turn until it confirms there is a drive present. (Sometimes it is easiest to do this by trying a fully-functional MMC card in the MMC slot first so you can confirm which drive letter it is.)

(NB. It will always be labelled as a [Removable Drive], don’t mistake it for one of your PC hard drives like [C:] drive, as that could be catastrophic later on!)

At this stage it may give an error message saying that the drive is unreadable.

By right-clicking on the drive letter, it will provide the option of formatting the drive.

Select format the drive, and the [Format Drive] dialog will appear (Double-check again to make sure it not your [C:] drive!).

There is only one setting to focus on in this page, and that is to ensure that the FileSystem selected for formatting is the [FAT] option (not FAT32, or NTFS or any other option)

(Note: All mobile phones, to my knowledge, and most cameras (etc..) use the FAT file system (or at least are compatible with it) on their memory card media.)

Now click on Format Now ( ensure [Quick Format] is not selected as this will not actually restore the file system space byte by byte, but only resets the header information so the drive thinks its empty again. This may not be enought to solve your corruption problem.)

The PC will now – hopefully!- chug away happily until it has restored the memory card space back to its original configuration (of course, any information on there is long gone by now!).

If you recieve an error message back from the [Format Now] request, then you can try anoither way to format your card, from the command line.

Formatting from the Command line:

Select Start-Run and Type: CMD

A Command window will appear (With the old-style DOS prompt).

And now you can type: FORMAT i: /FS:FAT   (where i: is the drive letter for your memory card)

Format your memory card at the DOS prompt

NB. (Remember again to not format your C: drive !!)

Sometimes a format at the DOS prompt will work where the Explorer format fails.

If your problem still persists, the damage to your may be more permanent, and not just a software issue. In this case, it may still respond to a format request in a different memory card reader or device.

If you believe it to be a failure of manufacture, then the warranty on the card offers the prospect of a replacement card, subject to a confirmation of the fault upon return of the goods.


Having said all that, if care is taken with your MobyMemory card, noting the points above, then it should serve you well for many years without a problem…

Hey, your mmc got corrupted, going to buy a new one? Stop here and see it. you can try to repair it.
All the memory card are based on the FAT file system and not the FAT32 or NTFS file system. for repairing you will need a corrupted mmc, a mmc reader, and a PC, obviously.

1) Insert your card in the mmc reader.
2) Find the drive in which it is inserted from your pc.
3) Right click the selected drive and select FORMAT but NOT quick format.
4) Now, in the file system selection part, select the file system to be FAT and not FAT 32 or NTFS file system.
5) Start formatting.

You can also do this by using Windows Explorer.

Corrupted Memory Stick Data Recovery Long Description:

USB drive data recovery software file undelete and recovery utility to retrieve revive restore all your deleted, damaged corrupted formatted files and folders including MDB database, Excel XLS, DOC word Documents, jpg, jpeg, tif, gif, riff, tiff, avi, png, bmp, mpeg, mov, wav, midi, audio, video, digital, pictures, songs, mp3, music.

This software has a very attractive graphical user interface and it is very user friendly.

Thumb drive data recovery software non destructive and read only software scans your storage device completely and locate all your lost files by their internal file structure that enables a user to retrieve data safely that is lost due to virus infection unexpected system shutdown software failure hardware malfunction power surges.

This utility restores overwritten missing lost compressed and encrypted documents from external storage media. The software supports damaged data tracks of memory stick pen drive and provides detailed help system for easy recovery retrieval of data hence providing the user fast turn around time.


*Recover Retrieve lost files and directories including avi, png, jpg, jpeg, tif, gif, bmp, mpeg, mov, wav audio, video , digital pictures, and other application file types.

* Support all types of memory sticks and usb drives like Transcend, Kingston, Sony, Corsair, SanDisk, ,Ridata Supermedia, Apacer, Kingmax, Lexar, Viking, Super Flash in all capacities e.g. 64MB, 128MB, 256MB, 512MB, 1GB, 2GB.

* Restore data when DRIVE NOT FORMATTED message is displayed by your computer while accessing USB removable media drive

* Enables recovery and retrieval when memory stick volume is not recognized due to undetected file system.

* Performs scanning and locate data to the safe location according to internal file structure

* Undelete unformat removable media drive utility for damaged corrupted formatted bad sectors.

* Considered as a fault tolerant software utility with attractive graphical user interface and inbuilt help.

In general, there are two reasons why the data on memory flash devices (cards, USB-sticks, SSD) becomes inaccessible.
Logical damage prevents access to the data/pictures on the drive, but the drive is still physically recognized by the computer operating system. In this case some specialized types of recovery software can help. Sometimes free recovery tools like Zero Assumption Recovery can also solve this problem.
Physical damage causes the drive to be unrecognized by the computer’s operating system, making it impossible to access the contents of the flash-memory chip. This type of damage happens in more than 80% of all known cases. These are most frequently caused by electrical problems that lead to physical damage. Flash devices consist of a memory chip and a controller. The controller writes and reads the data from the memory chip. In most cases, recovery is possible from a flash device with a damaged controller and mostly undamaged memory chips.

Formatting is required? The controller of the memory card is not in the position to inform the PC operating system about the characteristics of the memory card. Therefore, the PC assumes that the memory card is not formatted and requests formatting. One might think that the memory card problems would be solved by formatting, but unfortunately it does not work due to the damaged controller. Instead, the computer will communicate that formatting is not possible. Such an error is a clear indicator that no kind of software (including special formatting or rescue software!!) will be able to access the memory card. 

Recoverfab Recovery Process: If the flash storage device is not recognized in the computer or it is impossible to access the data on it, there is only one way to get the data: unsolder the memory chip from the printed circuit board and directly access the raw data with a programmable chip reader. Below, you can see an illustration of our recovery process.

Recoverfab is an enterprise for the data rescue of flash memory cards (Secure Digital SD [mini SD, micro SD, SDHC, SDHC Plus], Compact Flash CF, Multimedia Card MMC, Memory Stick [MS, MS Pro, MS Pro DUO], Picture Card xD)/USB flash drives, operating world-wide. The rescue laboratory is located inGermany, near Munich. If you have any questions, please use our contact form.What distinguishes our offer from those of the competition?

  • Recoverfab specializes in the data rescue of memory cards/USB-flash drives (not as a sideline or second business of non removable disk data rescue).
  • We tell you in advance the price for the service (pricing).
  • We support cost-containment (see order form).
  • Recoverfab operates a no-data, no-fee policy.
  • We provides FREE media analysis for cards/USB drives for which we are unable to recover data, with photo documentation of physically broken memory chips.
  • Payment is required only after you have inspected and are satisfied with the recovered image samples/file list. If non of the recovered files are wanted or needed, then no charges will be made and the contract is void and no costs are incurred.
  • You can keep track of the processing status (incoming, completion, shipment, etc.) on our protected customer service area.

When can files/pictures be recovered?

  • inadvertent deletion
  • card requests to be formatted (memory card controller damaged!)
  • inadvertent formatting (only if the camera does not overwrite the addresses of the sectors (CAMERA), not recoverable are: Canon Ixus/Powershot, Casio Exilim, Olympus Camedia/u830)
  • abort through empty accumulator (memory card controller damaged!)
  • storage medium is no longer recognized (memory card controller damaged!)
  • error messages like: memory card error – unreadable card
  • pictures were transferred to PC, but were damaged
  • damage by external influences (liquids, heat, dirt)
  • physical damage, without memory chip destruction (see pictures below)

Data rescue from physically damaged memory cards
The big black rectangle is the memory chip. Since there are no cracks on it,
data rescue is possible.

Memory cards with damaged memory chips
The cracks in the housing have also damaged the memory chips. Unfortunately, nobody will be able to repair the chips or rescue the data.


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