Devices · flash drives & memory sticks
Nothing important is ever deliberately kept on a memory stick, yet it happens constantly: the only copy of the accounts, a temporary backup in its third year. Break the plug off or lose the controller and the flash inside generally comes through both. That chip is where the work starts, and Maidenhead posts in a steady supply of it.
Describe the fault to an engineer
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| The symptom | The likely cause | Start here |
|---|---|---|
| Code 43 — Unknown USB Device (Device Descriptor Request Failed) | The stick answers nothing at all; its controller has stopped | Stop plugging it into other ports |
| USB device not recognized | Enumeration never completes on the stick | Give it one other port, then stop entirely |
| You need to format the disk in drive X: | A damaged file system above intact data | Never agree to the format offer |
| Please insert a disk into removable disk — reads 0 bytes | The controller can no longer address its flash | Chip-level bench work |
| File or directory is corrupted and unreadable — error 0x80070570 | The FAT or exFAT structures are damaged | Repairable; write nothing more to it |
| Windows was unable to complete the format | The controller is beyond reviving | Fortunate that it declined |
Nothing becomes chargeable until you have said yes to it. Each item takes a case number of its own the moment it arrives, an engineer establishes what has actually failed, and you are given a candid view of which files stand a realistic chance of returning. The single quote that follows is fixed, written down, and costs nothing.
On an older stick the memory package lifts clear of the board and is read alone. A monolith offers no such option: flash and controller are moulded as one piece, and the way in is test pads measured in tenths of a millimetre.
Blocks are relocated for wear levelling, spread across planes for speed, then scrambled on the way out. Each of those layers is reversed in software until files with names and dates appear again.
The recovered listing goes to you for approval before anything becomes chargeable, and what comes back arrives on new media.
Nothing is billed until you have seen the recovered file list in full and told us to go ahead. What comes back arrives on new media, with the return journey at our cost, and the case stays open at this end until you have opened every file yourself.
An honest word on the odds: reliable public failure rates for consumer flash do not exist, because nobody operates fleets of memory sticks and publishes the figures the way the drive manufacturers do. What our own intake shows is narrower but consistent: most of the physical damage arrives as broken connectors, and the sticks that die without notice are overwhelmingly unbranded or handed out free.
The tax return was the deadline, and the stick carrying the CIS records and seven years of invoices had been stood on in a site office until its connector came away. Monolithic construction left the test pads as the only way in, so the controller pinout was mapped here first. Everything filed on time.
Usually not. The plug carries signal and nothing else; what you want sits in the memory package further along the board. A stick that has come apart in two will generally still read, so long as neither that package nor the moulded wafer has cracked.
No. It is the controller that has gone quiet, not the flash behind it; read that flash directly and the controller no longer matters.
They pair the lowest grade of flash with a controller to match, and some lie outright about capacity: a small die announcing itself as a large one, which behaves impeccably until writing passes the real limit. Adequate for carrying a film about; never the sole copy.
One circumstance only: a memory die cracked clean through. A failed controller, a board in pieces, translation tables in disarray — those are ordinary days at the bench.
Each further power-up asks more of a drive that has already begun to fail. Open the case first and let the free diagnosis tell you what is left.