A care home pulled a SanDisk Cruzer USB stick out of a PC without ejecting it. On reinsertion, Windows demanded a format and Explorer showed the drive as RAW. On it were patient records and medication schedules. The fear was that everything was gone. It was not — it was sitting behind a broken index, one wrong click away from real loss.
A care home’s SanDisk Cruzer USB stick was pulled out of a PC without ejecting it, and when it went back in Windows offered the message that empties more drives than almost any other: you need to format the disk before you can use it. File Explorer showed it as RAW. On it were patient records, medication schedules and administrative files.
That message is not a verdict on your data — it is Windows saying it cannot read the file system, the index that describes where files live. Yanking a stick mid-write commonly corrupts the FAT or the directory tables while leaving every actual file sitting untouched in the flash behind them. Accept the format and you build a clean new index over the top of the old one, which is the one thing that genuinely does start destroying data. So the first rule here is the simplest: do not click format.
The stick was write-blocked at intake — nothing written before anything is read — and imaged in full. On a healthy controller the flash can be read straight through it; where a controller is dead, the raw NAND is read directly with our chip-level equipment. Either way, the goal is one clean image before any repair is attempted, so every later step runs on the copy and never the original.
From that image the damaged FAT and directory structures were rebuilt, matching the surviving file records back to the data they point at. Where the index was too far gone in places, the remaining files were carved out by signature — documents and spreadsheets identified by their own internal structure rather than by a directory that no longer described them. This is the same discipline as any formatted-media recovery job: the format, or the corruption, breaks the map, not the territory.
The patient records, medication schedules and administrative documents came back, the spreadsheets among them checked and repaired where the corruption had nicked them, and everything was returned on fresh media. The care home carried on without a gap in its records — which, given what those records govern, was the entire point.
If a USB stick or memory card suddenly reads as RAW, or asks to be formatted when you know it is full, the file system is corrupt — the files are almost always still there. Do not format it, do not let a “repair” tool loose on it, and stop plugging it in and out hoping it rights itself. Each of those is a chance to overwrite what is recoverable.
The free diagnostic tells you what survived before anything is charged. Drop it at our Leeds address on Albion Street, or post it insured from anywhere in Yorkshire.