Data Recovery Case File · Formatted & Logical Faults · A Word That Misleads
Nothing Converted Your Card
His enquiry used a phrase that appears constantly and describes something that never happened. A 64GB microSD card: "Somehow the card was corrupted and converted into RAW format. I don't want to format and lose my data — are you able to retrieve it?" His instinct is exactly right and his terminology is understandably wrong, and the two are connected. RAW is not a format anything was converted into. It is what Windows displays when it finds a partition it cannot identify — a description of confusion rather than a state that was imposed. Understanding that matters, because the phrase "convert RAW to FAT32" leads directly to software that formats the card.
| Media | 64GB microSD card — partition present and filesystem unidentifiable to the host; described by the owner as converted to RAW; format declined |
| Reported situation | Card reported as corrupted · presenting as RAW to Windows · format prompt declined by the owner · contents required intact |
| Fault class | Filesystem structures unreadable over intact content — partition present; no conversion or deletion involved |
| Equipment used | No repair or conversion tools run · imaged write-blocked (DeepSpar USB Stabilizer 10Gb) · filesystem structures located and reconstructed on the image from backup copies · contents verified by opening |
The decode: what RAW actually reports, and why the word is dangerous
What Windows means by it: when a disk or card is connected, Windows reads the partition structures, finds a partition, and then looks at the start of it to identify which filesystem is present. When it recognises the signature it reports the filesystem by name. When it cannot — because the structures are damaged, incomplete or unreadable — it has to call it something, and the label it uses is RAW. That is the entire meaning: there is a partition here and I cannot tell what filesystem is in it. Nothing performed a conversion. Nothing changed the card into a different type. The card is exactly as it was, minus the ability to read a few small records.
Why the wording causes real harm: because "converted to RAW" implies a state that can be converted back, and that is what people then search for. The results are dominated by tools and guides promising to convert RAW to FAT32 or NTFS — and the only way any tool can produce a working filesystem where none can be read is to create a new one, which means formatting. So the phrase leads people directly to the single action that costs them their folders, filenames and dates. His refusal to format is the correct instinct, and it is the one thing standing between him and that outcome.
Why this is the recoverable category: a card presenting as RAW has powered, identified itself and reported its capacity, which eliminates the serious hardware faults. Only the layer describing the organisation of the space is unreadable, and the content sits physically intact behind it. Better still, filesystems keep backup copies of their key structures at known positions, so the originals can frequently be located and rebuilt — returning the folder tree and filenames rather than an unnamed carve.
What not to run: anything offering to convert, repair or check the card. Repair tools write their decisions back to the device, and on structures that are already damaged that can overwrite exactly what a reconstruction reads.
The phrase worth keeping: RAW does not describe your card. It describes Windows looking at your card and not recognising what it sees.
On the bench
No repair or conversion tool was run, since every one of them produces a readable filesystem by creating a new one. The card was imaged write-blocked behind the DeepSpar USB Stabilizer 10Gb, so that everything afterwards happened against a copy. On the image the filesystem structures were located — including the backup copies filesystems maintain at known offsets for exactly this event — and reconstructed until the volume mounted from the copy with its folder tree, filenames and dates intact. The contents were verified by opening before delivery on fresh media.
The outcome
The structures rebuilt from their backup copies on a write-blocked image, with folders and filenames returned intact. Free assessment, one fixed written figure including VAT, no recovery, no fee. The decode, and his instinct was right: RAW is not a format anything converted your card into — it is simply what Windows displays when it finds a partition and cannot identify the filesystem inside it, so nothing was imposed and nothing changed; that wording is dangerous because it sends people searching for ways to convert it back, and the only way any tool creates a readable filesystem where none can be read is to make a new one, which means formatting. Refusing that is the whole of the right answer.
Card or drive showing as RAW
Don't search for how to convert it back — that phrasing is the trap. RAW isn't a format anything turned your card into; it's simply the label Windows uses when it finds a partition and can't identify the filesystem inside it. Nothing was converted and nothing was imposed. But because the word sounds like a state, people look for tools promising to convert RAW to FAT32 or NTFS, and the only way any tool can produce a readable filesystem where none exists is to create a new one — which means formatting, and losing your folders, filenames and dates. If you've refused the format prompt, that's the single most important decision and you've already made it correctly. Don't run repair or check utilities either, since those write their decisions back. Your files are sitting intact behind a few small unreadable records.
Nothing converted it — call Glasgow Data Recovery on 0141 404 0294; imaged write-blocked, structures located from their backup copies and rebuilt, folders and filenames returned intact.
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Our case files are drawn from genuine enquiries received by our laboratory over the past ten years, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery procedure our engineers apply to that fault, using the equipment listed.