Logical & corruption · card work · ADR-2025-3482
One Machine Said Corrupt. The Other Showed the Pictures.
She stated that her 8GB memory card was not full
, but it says is corrupted when put it in my laptop
. However, she noted that she could still see the photos on my camera
. Prior to ringing us, she used different devices and adapters
to check her memory card. Upon doing so, she independently came to her own conclusion: it's definitely the memory card
. Her assessment that the memory card was the problem was correct, however the camera had already provided her with the more useful portion of that assessment.
Same story on yours? Tell us what it does — the look is free.
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What failed, and why.
Memory cards contain two distinct items and each item can fail independently. One contains a relatively small number of records containing a name, size and beginning location of each file. The other is simply images placed where they are written and paying absolutely no attention to the validity of these records. As the camera essentially just uses the simplest method possible to ask for images from a memory card, it continued to find images on the memory card. A computer expects the entire file system to agree and when it doesn't, Windows uses the term "corrupt" and immediately offers to correct the problem. When this is accepted, a new blank file system will overwrite all of the previously existing records that were to be used during a rebuild. Memory cards or sticks fall within the published £250 + VAT price range. Determining which fault you've experienced is free.
What the bench did with it.
The order of the job →| Equipment used | Its work on this job | The reason for it |
|---|---|---|
| PC-3000 Flash | Used a controlled reader to create a complete copy of the memory card's data; took nothing on faith from its file system. | Directly reads the flash off the chips, going around the controller, with a maker-ID library kept updated here |
| R-Studio Technician | Recreated the original records that were still recoverable. | Constructs an array from the images, and reads nearly every file system |
| UFS Explorer Professional Recovery | Using signatures, carved as much of what remained recoverable as possible wherever a record was past mending. | When other applications will not open it, this application will open APFS, ReFS, XFS, ZFS and Btrfs. |
What the bench did with it.
Nothing starts until a copy exists
When powered on, a memory card's controller is going to do some internal cleaning (housekeeping), without regard for any block that may need to be recovered later. Therefore, we copied everything first. We created a complete copy of the memory card behind a write blocker on a controlled reader and then put the memory card back into its case. Once this was done, everything else was done relative to the copy and therefore none of the subsequent steps could lose her any photos.
Use whatever the structure still gets right
The structure wasn't entirely lost. A picture's record was used as long as it was still a proper description of its file; the photo reappeared complete, along with its own filename, date taken and full block sequence. That restores her original photographs instead of some later composite. All other records which didn't make sense any more were set aside rather than trusted.
What was left had to speak for itself
Pictures outside of the scope of a record were made to identify themselves. Camera RAW and JPEG signatures were extracted from the raw blocks, the associated data were put back into order, and a filename was only assigned to a picture where information contained in the header, or a readable date, justified one.
What went home.
The majority of the card was delivered with original filenames intact. Whatever had to be carved was given names created by the bench, in a folder by themselves; these images were opened and viewed here first because viewing a list does not prove anything regarding a photograph. One directive was also sent back with the new card: if your camera can still read a card a computer says is corrupt, refuse the computer's offer to fix it. The price of £250 + VAT per card was confirmed in writing prior to any cost incurred.
Begin here if yours is doing the same thing.
More jobs where files would not show and volumes would not read.
Yours doing something similar? Power it down first.
Published prices are fixed. Memory cards and USB sticks are £250 + VAT. Any stand-alone drive is £300 + VAT. Drive configurations containing multiple disks (RAID, NAS or server) start at £500 + VAT. First assessments are always complimentary. Thereafter, data recovery charges are also fixed in advance and in writing, so you'll always know how much you owe before paying any money. Shut it down, get a quote first (by phone or with the form), then send it in or drop it off at our Guildford intake laboratory, Monday to Friday, 9am to 5:30pm (no appointment needed). On most jobs you only pay if we recover your data.