His account is a hard lesson told honestly. A few years ago he "deleted the wallet.dat files" on an external drive; later, realising what they were worth, he went looking and "could not find" them. Recovery software confirmed the worst — "the files have been overwritten" — and now he asks whether a "force magnetic microscopy service" could recover the details, offering to travel with the disk. The honest answer has to come first, because it saves him a journey and a fee: once data is genuinely overwritten, no technology — magnetic force microscopy included — reliably recovers it, and any service claiming otherwise is selling a myth.
| Media | External hard drive from which wallet files were deleted years ago and, per the owner's own recovery attempt, subsequently overwritten — the question being whether exotic imaging can reach overwritten data |
| Reported situation | Files deleted deliberately in the past · long interval of continued drive use since · a later realisation of their value · recovery software run, reporting the files overwritten · a hopeful enquiry about magnetic force microscopy · willingness to travel with the disk |
| Fault class | Not a recoverable fault where the data is truly overwritten — a request that meets the physical limit of magnetic storage, distinct from ordinary deletion, which is recoverable until overwritten |
| Equipment used | Honest assessment before any billable work — the drive imaged under a hardware write-blocker and the reported state independently verified · unallocated space and filesystem remnants swept in X-Ways Forensics to confirm whether the files are truly overwritten or merely deleted · any older copies elsewhere pursued — earlier drives, backups, exports · a clear statement drawn between recoverable deletion and unrecoverable overwrite, with no exotic technique offered that does not work |
Deletion and overwriting are different events, and only one of them is reversible. Deleting a file removes its directory entry but leaves the data in place until something writes over that space — which is why ordinary deletion is so often recoverable. Overwriting means new data has physically replaced the old on the disk surface. His own recovery software reporting the files overwritten, after years of continued use, describes the second, irreversible case: the space where the wallet lived has been reused.
The magnetic force microscopy hope is a persistent myth, and honesty about it is the whole service here. The idea that faint magnetic "ghosts" of overwritten data survive and can be read by advanced microscopy comes from decades-old speculation about old, low-density drives. On modern high-density drives it does not work — the technique has never been demonstrated to reliably reconstruct real overwritten user data, it would be astronomically slow and expensive if it did, and no legitimate laboratory offers it as a working recovery route. Any service advertising it is trading on the myth, and he should not pay for it.
The one genuine uncertainty is whether "overwritten" is truly what happened. Consumer recovery software sometimes reports files as overwritten when they are merely deleted, fragmented, or beyond that particular tool's ability. That distinction is worth checking properly and free: an independent sweep of the drive's unallocated space can confirm whether the data is genuinely gone or actually still present and recoverable. It is entirely possible his software was wrong — and that is the first thing established, before any conclusion is drawn.
If the data is truly overwritten, the productive search moves off this disk entirely. Data has a way of leaving copies. An earlier drive the files once lived on, a backup made before the deletion, an export or transfer to another device — any of these could hold what this disk no longer does. For a wallet specifically, the recovery phrase, if it was ever recorded anywhere, opens the wallet without needing the file at all. The effort goes where recoverable copies might exist rather than at a surface that has been reused.
The honest close protects him from worse actors. If the file is confirmed overwritten and no copy exists elsewhere, it is beyond reach — his and everyone's. Saying that plainly is the professional answer, because the alternative is a laboratory taking his money and his travel for a technique that cannot deliver. The kindest service is the true map, not a hopeful one.
The drive was imaged under a hardware write-blocker and the reported overwritten state independently verified, rather than taken on the software's word. Unallocated space and filesystem remnants were swept in X-Ways Forensics to distinguish genuine overwrite from recoverable deletion, and any older copies elsewhere — earlier drives, backups, exports — pursued as the real avenue. The boundary between recoverable deletion and unrecoverable overwrite was stated plainly, with no unworkable technique offered.
An honest verification of whether the data is truly gone, a proper search for copies that might survive elsewhere, and a straight answer about the limits of magnetic storage. The assessment is free and the quote is a single fixed figure inclusive of VAT; if the data cannot be recovered, there is nothing to pay. The decode: overwritten means physically replaced, and no microscopy brings that back — anyone offering it is selling a myth. First we confirm whether it really was overwritten, then we hunt copies elsewhere, because that is where a recoverable version might actually live.
Understand the line: deleted files are often recoverable, but genuinely overwritten data is physically replaced and cannot be reliably brought back by any technology, magnetic force microscopy included — treat any service advertising it as a red flag. But verify before despairing, because consumer software sometimes reports files as overwritten when they are only deleted; an independent check can tell the difference for free. And search everywhere a copy might survive — earlier drives, old backups, exports — since that is often where a recoverable version actually is.
Our case files are written up from genuine enquiries our lab has handled for customers across Staines, Surrey and the surrounding area, anonymised to protect client confidentiality. Each one describes the diagnostic and recovery approach our engineers apply to that fault, using the equipment listed.
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