What to do right now
- Try a different USB port directly on the PC, then a second computer, without a hub or extension cable.
- Open Disk Management and note how the stick appears: with a size, as RAW, as Unallocated, as No Media, or not at all.
- If it is listed with its real size, scan the physical device read-only and save your files to another disk.
- If it is missing everywhere, stop plugging it in repeatedly and consider a recovery lab for important data.
Step by step
Rule out the port and the PC
Plug the stick into a USB port on the back of a desktop or directly into a laptop, not into a hub, keyboard or front panel. Try a second port and, if possible, another computer. Wiggle nothing: a loose connector that works only at a certain angle is a hardware fault, and repeated wiggling can break the solder joints completely.
Look in Disk Management
Press Win+X and choose Disk Management. Look for a removable disk of about the right size. Write down what you see: a healthy partition without a letter, a RAW partition, Unallocated space, No Media, or no entry at all. Do not click Initialize, New Simple Volume or Format on that disk.
Check Device Manager if it is missing
Press Win+X and open Device Manager. If the stick appears under Disk drives, Windows can talk to it. If you see Unknown USB Device, often with a message such as Device Descriptor Request Failed, the controller is not responding properly and software recovery is unlikely to work.
Fix a missing drive letter safely
If the partition looks healthy but has no letter, right-click it in Disk Management and choose Change Drive Letter and Paths, then Add. This only changes how Windows mounts the drive and does not write to its file system. If the folders then open, copy your files off straight away.
Scan the physical device
For a RAW, Unallocated or unreadable stick, run FileFix Ultimate as administrator, open Deleted file recovery and select the physical disk entry for the stick rather than a drive letter. Start the Balanced scan; it reads FAT32, exFAT or NTFS records and searches for lost partitions, then falls back to signature search if needed.
Save to another disk, then decide
Save recovered files to the PC's internal drive or another external disk. Open a sample to confirm they are intact. Only after that should you format the stick, and if it failed without an obvious cause, replace it instead of trusting it with new data.
What each Disk Management view tells you
A partition with a file system but no drive letter is the mildest case: Windows simply did not assign one, often after the stick was used on another PC or a letter conflict with a network drive. A RAW partition means the size is known but the file system cannot be read, usually after the stick was pulled out during writing. Unallocated space means the partition table at the start of the stick is missing or damaged, while the data behind it may still be intact.
No Media or a size of 0 bytes is different. The USB connection works, but the controller inside the stick cannot reach its memory chip. That is a hardware failure that software cannot read past; a lab can sometimes read the chip directly.
When the stick shows but folders won't open
Sometimes the drive letter appears, but opening it gives messages such as the file or directory is corrupted and unreadable, or location is not available. The file system is damaged, typically from unsafe removal or a worn-out flash chip. Windows may then suggest scanning and fixing the drive. That repair can delete damaged entries, so treat it like formatting: recover first, repair afterwards.
A stick that becomes read-only on its own, or very slow, is often near the end of its life. Many flash controllers switch to read-only mode when they run out of spare blocks. That is the best moment to copy everything off, because the next failure may not be readable at all.
Common mistakes
Plugging a failing stick in and out dozens of times, trying every repair utility from the internet, or using the manufacturer's low-level format tool all reduce the chance of recovery. Low-level and mass production tools rewrite the controller's tables and erase the stick. Counterfeit sticks that claim far more capacity than they have are another trap: once you write past the real size, earlier files are silently overwritten, and the stick can stop mounting.
When it won't work
- A stick that appears nowhere, not even in Device Manager, or shows as an Unknown USB Device usually has a failed controller or connector.
- No Media or 0 bytes in Disk Management means the memory chip is not reachable, so no software can read the files.
- If the stick was formatted with a full format or a manufacturer's low-level tool, the old data is erased.
- Physically broken sticks, such as a snapped connector or a cracked board, need repair or a lab before any reading is possible.
How FileFix Ultimate helps
- Reads the stick as a physical device even when it has no drive letter, and never writes to it.
- Recognises FAT32, exFAT and NTFS, rebuilds damaged FAT and exFAT boot sectors in memory and searches for lost MBR and GPT partitions.
- Falls back to signature search for 68 file types, including photos, Office documents, PDF, ZIP and videos.
- Disk health & tools can test a stick for fake capacity, but run it only after your files are safe because it writes test data.
FileFix Ultimate is free for personal use, works offline and never writes to the drive you are recovering from. Business use needs a one-year licence per PC. Check the signature before you run it.
Frequently asked questions
Why does my USB stick light up but not appear?
The light only shows that the stick receives power. If Windows does not list it in Disk Management or Device Manager, the controller is not identifying itself, which is usually a hardware fault.
Does reinstalling USB drivers help?
Sometimes, when the problem is on the PC side. Uninstalling the device in Device Manager and plugging it in again is harmless and worth a try. If the stick fails on several computers, the stick itself is the problem.
Is it safe to assign a drive letter in Disk Management?
Yes, that only changes how Windows mounts the partition. Initialising the disk, creating a new volume or formatting are the steps that write to the stick and should be avoided until your files are saved.