USB drive suddenly turned "RAW" and I can't open it anymore

Alex98

This happened out of nowhere. One minute my USB drive was working fine, and the next, Windows is telling me it’s a RAW file system and I need to format it to use it.
I haven't dropped it or unplugged it mid-transfer, so I have no idea why this happened. I really need to get my files back—is there any way to fix this without formatting and losing everything? Any tool or CMD trick recommendations?

Jesuan

Alex98 Don’t format it yet, try data recovery first.

ByteWhisperer_42

Alex98 Take a deep breath, OP. Your data is likely still there; the camera is just missing its lens, so to speak.

When a drive suddenly turns "RAW," it usually means the Operating System can no longer recognize the file system structure (like NTFS or FAT32). This happens because the Partition Boot Record (PBR) or the Master File Table (MFT) has become corrupted, often due to pulling the drive out while a write operation was wrapping up, or a sudden voltage spike.

Windows sees the raw, unorganized sectors, panics, and suggests formatting to create a fresh file system. Do not format it. Formatting will overwrite the file system structures and make recovery much harder. The sectors containing your thesis are still intact, just temporarily orphaned.

FixIt_V2

Alex98 Calm down, we can probably get this back. Since chkdsk failed you (which it always does with RAW drives, don't worry), your first step is image creation if you can, but assuming you don't have a spare drive, let's look at partition repair.

Download a free tool called TestDisk. It's a command-line interface, but don't let that scare you.

Run it as Admin, select your USB drive.
Choose the partition table type (usually Intel or EFI GPT).
Go to Analyse and then Quick Search.

If it finds your old partition, you can actually preview your files right there by pressing "P". If you see your thesis, copy it out immediately to your local C: drive. If the partition looks good, you can write the partition table back to the USB, and boom, it's back to normal. Try this first and report back.

Loading_99

Alex98 Ah, the classic "I have no backups of my life-defining document" ritual. A tradition as old as computing itself. Welcome to the club, your complimentary panic-sweat towel is in the mail.

Pro tip: Keep restarting your PC. I'm sure the fifth or sixth time will magically rewrite those corrupted hex values through sheer willpower and anime motivation.

Seriously though, RIP to your sleep schedule, but do not touch that format button unless you want to fast-track your descent into academic ruin. Stop panic-clicking and listen to the nerds in the thread.

Roy99

A USB drive suddenly turning RAW is such a pain, especially when you’ve got important stuff on it. But don’t panic, your data is usually still there, it’s just that Windows can’t read it anymore. The number one rule right now: do NOT format the drive, and don’t save anything new to it, or your data may truly be lost forever.

When a USB drive suddenly becomes RAW, it's usually not physical damage but a logical error. Could be corrupted file system, bad sectors, or even a virus.Whatever the cause, just remember: get your data back first (you can choose data recovery software to help you, in most cases, your files can be recovered). After that, you can consider formatting the USB drive.

Arch_POSIX

ByteWhisperer_42 "the camera is just missing its lens, so to speak."

That's a flawed analogy. It's more like the index card catalog of a library was burned down, but the books are still on the shelves.

Furthermore, attributing this solely to "pulling the drive out early" glosses over the systemic vulnerability of proprietary, non-journaling or poorly implemented file systems on cheap flash controller logic. If OP was using exFAT without proper sync flags, atomic writes are non-existent.

OP, this is exactly why FAT-based derivatives are ticking time bombs for critical data. You should have been using a local Git repository or at least a journaling file system, though Windows' handling of block devices with corrupted magic numbers is notoriously incompetent anyway.

Lurker_

FixIt_V2 Fascinating. Saving this breakdown of TestDisk. I have an old external HDD in my drawer doing the exact same thing. Question: Does TestDisk work if the drive is showing up as completely unallocated in Disk Management, or does it specifically have to say RAW?

ByteWhisperer_42

Arch_POSIX While your library catalog analogy is marginally more accurate, pedantry doesn't recover files.

Also, lecturing a panicked student on POSIX compliance and Git architecture while their thesis is in limbo is peak internet. Let's focus on the immediate issue. If the partition table is structurally broken beyond TestDisk's automated repair capabilities, the next logical step is raw signature scraping (file carving) using tools like PhotoRec or Recuva, bypassing the MFT/PBR entirely by looking for file headers like %PDF or PK.. (for standard docx files).

FixIt_V2

Lurker_ It works for both! "Unallocated" just means the OS thinks there's no partition at all, while "RAW" means it sees a partition but doesn't understand the language it's speaking. TestDisk searches for the backup boot sector or known file system signatures deep in the sectors regardless. Just make sure the drive's physical size is detected correctly in the tool. If a 64GB drive shows up as 0MB or 2MB, you've got a dead controller chip, and software won't save you.

Loading_99

ByteWhisperer_42 "Pedantry doesn't recover files" should be the banner for this entire sub.

But honestly, looking for %PDF headers? Bold of you to assume OP didn't save it as a .doc format from 2003 just to complete the disaster aesthetic.

Hey OP, if you're still alive and haven't thrown your laptop out the window, did you check if Windows created a shadow copy or if you accidentally synced your documents folder to OneDrive? Sometimes Microsoft forces cloud backups on you against your will. For once in your life, that corporate nosiness might actually save you.

Arch_POSIX

ByteWhisperer_42 File carving via PhotoRec should be a last resort, not a casual suggestion. Without the MFT, metadata like file names, directory structures, and timestamps are completely obliterated. OP will end up with 10,000 files named f123456.docx and will have to manually open every single one to find their thesis.

Before doing anything that modifies the block device, OP needs to use dd or a raw disk imager to clone the drive sector-by-sector to an .img file. Working directly on a failing, corrupted USB drive is technical sacrilege. One bad sector read loop and that cheap flash controller fries permanently.

Lurker_

Arch_POSIX "OP will end up with 10,000 files named f123456.docx"

Oh wow, okay, writing that down. So file carving loses the names. Good to know.

Also, what is dd? Is there a Windows equivalent for making a sector-by-sector image before running recovery software?

ByteWhisperer_42

Arch_POSIX I agree that bitstream imaging is best practice. However, we must balance technical orthodoxy with user capability. Asking a user who is currently in a state of panic to navigate forensic imaging tools can lead to user error, like accidentally cloning their empty local drive onto the USB, wiping it for good.

If the drive is stable (doesn't disconnect randomly, shows correct total capacity), a direct, non-destructive read-only scan with a reputable parser like R-Studio or DMDE is often safer for a novice than executing low-level CLI disk dumps. DMDE, in particular, can often reconstruct the directory tree even if the primary FAT/NTFS indicators are mangled.

FixIt_V2

Lurker_ Yeah, you can use OSForensics or even the free version of FTK Imager on Windows to create a raw image (.dd or .raw).

And Arch is technically right here (don't let it get to your head, Arch). Working on the live USB is risky if the hardware itself is dying. If OP's drive turned RAW because the NAND flash is reaching its write-cycle limit, every second it's powered on brings it closer to the grave. Clone first, scan the clone.

Loading_99

FixIt_V2 Look at you guys, evolving from arguing about semantics to actually giving safe advice. I'm so proud.

Though I love how we are all assuming OP knows how to use FTK Imager when they couldn't even manage to drag-and-drop a file into Google Drive once a week. OP is probably staring at the TestDisk command prompt right now like it's the Matrix source code.

Arch_POSIX

ByteWhisperer_42 "User error" is a symptom of poorly designed GUIs, not an excuse to ignore proper data integrity protocols. If they use DMDE directly on the block device, the software still forces repeated reads of potentially unstable sectors.

But fine, if we are capitulating to commercial software, DMDE's free tier allows recovering up to 4,000 files from a single directory, which is more than enough for a thesis. It's an acceptable compromise, provided they don't hit "Fix Boot Sector" blindly without verifying the hex offsets.

Lurker_

ByteWhisperer_42 Adding DMDE to the list. This thread is a goldmine. Hope the OP hasn't fainted yet, really curious to see if TestDisk or DMDE actually pulls this off.