Devices · USB sticks & flash
USB sticks carry a strange share of people's most important files — the only copy of the accounts, the backup that was 'temporary' three years ago. When one snaps or dies, the flash chip inside usually survives. That chip is where we work. Sticks from Brighton post in for the same free diagnosis as everything else on this bench, and £250 + VAT after it.
Talk it through with an engineer
01273 964902
| The message | What it means | First thing we do |
|---|---|---|
| Unknown USB Device (Device Descriptor Request Failed) — Code 43 | Windows can't read the stick's identity — controller fault | Stop reinserting it |
| USB device not recognized | Enumeration failure at the controller | One try on another port, then stop |
| You need to format the disk in drive X: | Corrupted file system over intact files | Never format |
| Please insert a disk into removable disk (0 bytes) | The controller has lost its map to the flash | Chip-level lab work |
| Error 0x80070570: file or directory is corrupted and unreadable | FAT/exFAT damage | Recoverable — stop writing |
| Windows was unable to complete the format | The controller is failing outright | And be glad it failed |
Your device is logged with its own case reference the moment it arrives. An engineer assesses the fault, confirms what's actually recoverable, and you get a fixed price in writing — no diagnosis fee, no obligation, and no paid work until you say go.
Classic sticks give up their NAND chip for direct reading; monolith sticks — all one sealed wafer — are read through their test points instead.
Flash controllers interleave, scramble and spread data across the chip. We reverse that transform in software to reassemble the real files.
You approve a file listing before paying, and the data comes back on fresh media.
Before you pay the recovery fee you approve a full listing of what came back. Your data returns on new media with free return postage, and the case only closes once you've confirmed everything opens on your side.
Straight answer on reliability: no robust public failure-rate data exists for consumer USB flash — unlike hard drives, nobody runs fleets of them and publishes the numbers. From this bench: physical intake is dominated by snapped connectors, and total failures cluster heavily in unbranded and promotional sticks.
Stepped on in a site office, connector torn clean off. The monolith was read through its test pads, the controller's layout reversed, and seven years of invoices and CIS records handed back before the tax deadline.
Usually yes. The connector is just the plug; your files live in the flash chip further up the board. Even sticks snapped completely in half recover well if the chip or monolith wafer is uncracked.
No — that's the controller failing to report, not an empty chip. Direct NAND reads bypass the controller entirely.
Budget sticks use lower-grade flash and controllers, and some are outright fake capacity — a small chip pretending to be a big one until you cross the real limit. Fine for a film, terrible for the only copy of anything.
A physically shattered memory die is the hard stop. Everything short of that — dead controllers, broken boards, corrupted tables — is routine chip-level work.
Every restart of a damaged device costs data. Open a case first — the diagnosis is free either way.