Quote from DataRecoverExpert on April 20, 2026, 1:24 pm

Before any direction can be given, a few details will determine which path is correct – and they matter a lot.

First: when you check Disk Management (Win+X → Disk Management), what exactly does the entry show? There is a real difference between a drive listed as RAW with a partition entry visible, and a drive showing entirely as Unallocated with no partition at all. Both are invisible in File Explorer, but they indicate different failure points with different recovery paths. USB not appearing in Disk Management at all is a third scenario with its own causes.

Second: what filesystem was the drive using – FAT32, NTFS, or exFAT? FAT32 is common on older USB drives; Windows 10 and 11 default to exFAT when formatting large USB drives. The recovery approach differs slightly between them.

Third: did anything happen before it stopped working – interrupted file transfer, laptop ran out of battery, machine shut down while the drive was still plugged in?

Fourth, and most critical: has anything at all been written to the drive since it stopped appearing? A format attempt, a repair tool, a single file saved to it, anything?

Both pieces of advice you received can be correct depending on the answers. Don't act on either until we have the full picture.

Quote from gareth_w on April 20, 2026, 2:30 pm

i'll weigh in on the general principle while you answer those questions, because the format advice is dangerous regardless of the specifics.

RAW doesn't mean the data is gone. it means Windows found no valid filesystem header when it tried to mount the drive – this is what a corrupted filesystem looks like from Windows' perspective. the actual file data lives in a completely different area of the flash storage – the data region – which is nowhere near the filesystem header. Windows reads the header first, gets nothing it recognises, marks the whole thing RAW and stops. the files are physically still there.

formatting writes a brand new filesystem header and zeros out the allocation table – which is exactly where a recovery scan looks to reconstruct your files. format first and you turn a recoverable problem into a much harder one. RAW corruption on a USB is one of the most recoverable situations there is, as long as nothing new gets written to the drive first.

Quote from phillyjohn on April 20, 2026, 2:35 pm

do not format it lol. your flatmate means well but that's exactly the wrong move here

Quote from miconos on April 20, 2026, 2:59 pm

@DataRecoverExpert oke okey, all four:

1. RAW with a partition entry visible – not Unallocated. the bar shows one partition, just says RAW where it should say FAT32
2. FAT32 – older drive, been using it about 3 years to move files between home and work
3. yes, exactly that – was copying a folder onto it, laptop battery hit zero mid-transfer with no warning. plugged the drive in the next day and got this
4. nothing written since. didn't even try opening it in File Explorer because it wasn't showing up there. the drive has just been sitting unplugged

Quote from annk_98 on April 20, 2026, 6:21 pm

power cut mid-transfer to FAT32 – that's a textbook case and honestly one of the cleaner RAW scenarios you can end up with.

your flatmate's advice makes sense in a corporate IT context where data doesn't matter – format the drive, it works again, done. but it ignores what's actually on the disk. FAT32 stores its filesystem metadata in specific sectors at the start of the volume: the File Allocation Tables (two copies) and the root directory region. Windows reads those on mount. if they're corrupted from an interrupted write, Windows marks everything RAW and doesn't go further. the data region where your actual files live is untouched.

recovery software skips the broken FAT entirely and scans sector by sector, looking for file headers – JPEG files start with FF D8 FF, PDFs with %PDF, ZIP archives with PK. it reconstructs each file from its header and size field without needing the FAT at all.

went through this with a SanDisk 128gb eight months ago. dropped it, connector got damaged, went RAW. this is actually a case where people assume they have a dead USB drive and panic – but it's usually just a corrupted filesystem, not dead hardware. got back 94% of everything. your situation sounds cleaner. this exact scenario shows up on r/datarecovery constantly and the answer is always the same: why did the USB drive suddenly stop working? almost always it's a filesystem write that got interrupted, not hardware failure

Quote from DataRecoverExpert on April 20, 2026, 6:23 pm

With those four answers, the situation is clear. FAT32, partition table visible and intact, failure from an abrupt mid-write power cut, nothing written to the drive since. This is a partition corruption case with strong recovery odds.

What happened technically: FAT32 stores two copies of the File Allocation Table at the start of the volume precisely because corruption happens. A mid-write power cut can leave those FAT copies partially updated or inconsistent. Because the FAT region and the data clusters are in separate areas of the disk, the power cut can corrupt the FAT without reaching the data region at all. Windows reads the FAT on the next mount, finds the signatures invalid or mismatched between the two copies, and marks the whole volume RAW. Your files are where they were before the cut.

Try this before running any software: right-click the RAW volume in Disk Management and assign a drive letter. If one of the two FAT copies survived intact, Windows may mount the volume using that copy and give you direct access. If File Explorer opens and your files are visible, copy everything to a separate drive immediately and stop there; no software is needed.

If it opens to an empty folder, or Windows prompts you to format, close it without clicking format. That's what I'd call partial FAT corruption: both copies of the FAT were damaged, so the partition is visible but the file allocation data isn't. The drive is USB detected but not accessible in the normal sense – hardware is fine, filesystem layer is broken. At that point, run Disk Drill on the physical disk entry with All recovery methods. This step-by-step guide covers this exact scenario. Preview files before recovering, and recover to a completely separate drive – not back to the Kingston.

One note on diskpart and command prompt: some guides suggest running diskpart commands or using command prompt to reassign drive letters for drives in this state. That's valid for drives that appear as Unallocated with missing partition entries – but for your drive with a visible RAW partition, the Disk Management right-click method is safer and achieves the same result without risking writes to the volume.

Quote from miconos on April 20, 2026, 8:49 pm

tried assigning a letter. worked fine, opened File Explorer.

most of my folders are there and accessible. but the one i actually need – invoices folder, should have about 40 PDFs – is completely empty. folder is there, name is correct, nothing inside it. is that the partial FAT corruption you mentioned @DataRecoverExpert? like the folder entry itself survived but the entries pointing to the files inside didn't?

Starting the full scan now. installed Disk Drill on C:, selected the top-level Kingston entry. running

Quote from gareth_w on April 20, 2026, 9:14 pm

yes, exactly that. in FAT32 every directory stores its own 32-byte entries for each file inside it – filename, file size, attributes, and the starting cluster number that points into the FAT chain. when the power cut happened mid-copy, some of those directory entries for your invoices folder got partially written or zeroed before they could be committed. the folder record itself was already on disk and survived, but the entries inside it that referenced your PDFs didn't make it.

Disk Drill will find them anyway through file carving – it reads every sector on the physical disk and locates PDF files by their %PDF signature in the opening bytes, completely independent of what the directory table says. download it from CleverFiles – scan and file preview are completely free, the Pro license is only needed when you export. after the scan check the Reconstructed section and filter by .pdf – this guide explains exactly what each results section shows and how to navigate them. the files will come back with generic names since the original directory entries are gone, but the content will be intact. you can match them to the right invoices by file size if you roughly know how large your PDFs are

Quote from NikitaX on April 21, 2026, 12:52 pm

jumping in – @gareth_w when you say physical disk entry in Disk Drill, is that different from the volume that shows up under it? i've got the same RAW problem and i'm looking at the app right now trying to figure out what to click

also tried everything before getting here: update USB drivers in Device Manager, reinstall drivers by uninstalling the device and replugging, change USB port three times, even tried to enable device in Device Manager after it showed a yellow warning. none of it changed the RAW status. just so others know – those steps are worth doing if the drive isn't showing up in Disk Management at all, but in my case the drive was visible as RAW the whole time, so driver fixes didn't help

Quote from annk_98 on April 21, 2026, 12:54 pm

@NikitaX yes, different. in Disk Drill's Storage Devices panel each physical drive shows as a top-level line – something like "Kingston DataTraveler – 64.0 GB" – with any volumes or partitions indented below it. on a RAW drive the volume entry often doesn't appear at all. always select the top-level hardware entry. scanning just a partition can miss data outside the partition boundaries, and on a drive with corrupted FAT those boundaries may not even be reported accurately

on the driver steps you mentioned – those are the right first moves when a USB drive is not recognized on any computer or doesn't show up in Disk Management at all. if you're trying to fix a USB drive not showing up and the drive doesn't appear anywhere – not even as Unallocated disk space – then updating or reinstalling USB drivers, changing USB port, or checking why the USB drive suddenly stopped working at a connection level makes sense. once it's visible in Disk Management as RAW though, the problem has moved from a USB connection problem or driver layer to a filesystem layer. different fix needed

Quote from lomon_sl on April 21, 2026, 1:34 pm

when the scan finishes – before you try to browse the results manually, type ".pdf" into the search filter in Disk Drill. on a 64gb drive you'll easily get a few thousand entries in the results list. filtering by extension first cuts it down to just what you're looking for. if you roughly know the file size of your invoices, sorting by size after that makes it even easier to find the right ones

Quote from miconos on April 21, 2026, 2:11 pm

update: it worked, mostly

scan took about an hour and a half over USB 3.0. used the .pdf filter in Reconstructed like @lomon_sl said – that tip was genuinely useful, the full results list was huge. found 38 files. previewed six: four opened completely fine, right content, right client names. two came up blank – those are almost certainly the exact PDFs that were mid-transfer when the laptop died, so the data was never fully written to disk. expected that

the folders i could already browse in File Explorer are all showing in the scan results with their original names intact. so the final count is 36 invoices recovered out of 40. the four that are gone i can rebuild from emails, annoying but manageable

@DataRecoverExpert – the thing that actually clicked for me was realising the FAT corruption and the files being corrupted are two completely different things. the files were fine the whole time, only the index pointing to them was damaged. @gareth_w @annk_98 proper explanation of what was actually happening made this feel less like a gamble. @phillyjohn – you were right, format would have taken out both the index and the data

Quote from gareth_w on April 21, 2026, 2:14 pm

36 out of 40 from a mid-transfer power cut with no writes after – that's a good result for that scenario. the four you lost were never going to come back, those clusters were never committed to disk. glad it worked out

Quote from kimheyon on April 21, 2026, 2:16 pm

two weeks late but leaving this here because this thread is why i have my files back. exact same situation – RAW in Disk Management, flash drive not showing up in Windows 11, family member telling me to just format it.

the assign-letter step didn't work for me, folder opened empty. but the full scan recovered everything. if you landed here googling why is my USB not showing up or how to recover data from a USB that went RAW – the answer is almost never that the drive is dead. check Disk Management first. if it shows RAW with a visible partition, follow this thread. if it shows Unallocated or doesn't appear in Disk Management at all, that's a different problem worth looking up separately.

for anyone not sure what they're looking at, the Disk Management docs on Microsoft's site are actually pretty clear, and there's a more readable breakdown on HowToGeek too. good luck to whoever finds this at 1am