Resources · Recovery Guides

Data recovery guides.

Practical, device-by-device advice on what to do — and what to avoid — the moment storage starts to fail. Written from over twenty-five years of recovering drives in-house, because the right first move often decides whether your data comes back at all.

Written by our engineers
Over 25 years in Bristol
HDD, SSD, RAID & more
// the golden rule

If in doubt, switch it off.

Most data is lost after the failure, not during it — by carrying on regardless. These rules apply to every device below.

Power off
at the first odd noise
Don't
run software on a dying drive
Never
open the drive yourself
Label
RAID / NAS disks in order
// first five minutes

Your drive just failed. Do this first.

Whatever the device, the same five moves protect your data and your chances of a full recovery. Work through them before you try anything else.

01

Stop using it

Every photo taken, file saved or program opened can overwrite data that's still recoverable. Put the device down.

02

Power it down

If it's clicking, beeping or not spinning, switch it off at once. Each power cycle of a failing drive risks making the damage permanent.

03

Don't run software

On a physically failing drive, recovery and "repair" tools keep it powered and hammer the weak areas — usually turning a recoverable drive into a lost one.

04

Don't open it or DIY

No freezer tricks, no opening the casing, no swapping circuit boards. These myths cause real, often irreversible damage.

05

Get a free diagnostic

Drop it off or post it to us fully insured. We tell you exactly what's recoverable, and what it costs, before any chargeable work begins.

// jump to a guide

Guides by device.

Pick the device you're dealing with for the warning signs, the dos and don'ts, and how recovery works for that media.

// hard-drive recovery

Hard drive recovery guide.

Spinning hard drives fail in two very different ways. Logical failures — deleted, formatted or corrupted data — leave the drive working and are often the safest to recover. Physical failures — failed heads, a seized motor or dead electronics — mean the drive needs bench work, and the wrong first move can finish it off. Knowing which one you're facing is the whole game.

!Warning signs
  • A clicking, beeping or grinding noise on power-up
  • The drive doesn't spin up, or spins then stops
  • It disappears from the BIOS, or vanishes mid-use
  • Very slow, with long freezes opening files
  • A SMART warning at boot
Do this
  • If it still reads, back up your most important files first
  • Stop using it the moment you hear an unusual noise
  • Note exactly what happened — dropped, power cut, or just died
  • Keep it cool, still and disconnected until it's looked at
Avoid this
  • Power-cycling a clicking or non-spinning drive over and over
  • Running repair or recovery software on a failing disk
  • Opening the casing or swapping the circuit board yourself
  • The "freezer trick", or giving it a knock

We recover hard drives in-house — matching donor heads and parts, imaging weak drives sector by sector, and rebuilding damaged file systems.

More on hard drive recovery →
// ssd & nvme recovery

SSD & NVMe recovery guide.

Solid-state drives have no moving parts, so they don't click or grind — they tend to fail suddenly and silently. Controller lock-ups, firmware faults and "sudden death" are the usual culprits. Two things make SSDs different from hard drives, and both matter: TRIM, which permanently erases deleted data within minutes, and the fact that flash slowly loses its charge when left unpowered.

!Warning signs
  • The drive vanishes from the BIOS, often overnight
  • It reports the wrong capacity, or 0 bytes
  • It turns read-only, or slows to a crawl then disappears
  • It died during or just after a firmware update
Do this
  • Stop writing to the drive straight away
  • After an accidental deletion, power down fast — TRIM works in minutes
  • If you store an SSD long-term, power it up occasionally
Avoid this
  • Carrying on using the PC after deleting something (TRIM)
  • Running "secure erase", repair or optimisation tools
  • Assuming deleted always means recoverable on an SSD
The TRIM catch: on most SSDs, once a file is deleted the drive begins wiping those flash cells within minutes, whether you reboot or not. If you've deleted something important, shut down immediately and don't write anything new.

Our engineers read the NAND directly in technical mode, rebuild the drive's translator tables, and work at controller level to bring data back from dead SSDs.

More on SSD & NVMe recovery →
// external drive recovery

External hard drive recovery guide.

An external drive is a normal hard drive or SSD in a case — so it can fail in all the same ways, plus two of its own: the little USB-to-SATA bridge board that connects it, and the hardware encryption many enclosures apply automatically. That encryption is why pulling the drive out and reading it directly often gives you nothing but scrambled data.

!Warning signs
  • It doesn't appear on any computer, cable or port
  • Windows or macOS prompts you to format it
  • It clicks or stops mounting after being knocked or dropped
  • The light comes on but nothing mounts
Do this
  • Try a different cable and port first — it rules out the simplest cause
  • If it was dropped or is clicking, stop and send it in
  • Remember many externals are encrypted at the bridge
Avoid this
  • Replugging a clicking or dropped drive again and again
  • "Shucking" an encrypted drive to read it raw — you'll get ciphertext
  • Formatting it when prompted

We bypass failed bridge boards, decrypt bridge-encrypted volumes, and carry out head and motor work on dropped units — all in-house.

More on external drive recovery →
// usb stick recovery

USB flash drive recovery guide.

A USB stick is flash memory on a tiny controller chip. The good news: when one fails, it's usually the controller or a snapped connector that's gone, while the memory holding your data survives. The bad news: that data is scrambled by the controller, so getting it back is specialist work — not a job for a "repair" tool.

!Warning signs
  • It isn't recognised, or shows no light at all
  • It prompts you to format before it'll open
  • The connector is bent, wobbly or snapped off
  • It connects and drops out at random
Do this
  • Stop using it as soon as there's a problem
  • If the connector has snapped, keep both pieces
  • Note what was stored on it
Avoid this
  • Wiggling or forcing a loose connector — it cracks the board
  • Reformatting it
  • Trusting a "USB repair" tool that writes to the drive

We read the memory chip directly — chip-off, or through a monolithic stick's internal test pads — and rebuild your files from the raw flash.

More on USB stick recovery →
// memory card recovery

SD & memory card recovery guide.

Memory cards corrupt most often for two reasons: they're pulled out (or the camera dies) mid-write, or they're formatted in-camera by mistake. In both cases the photos and video almost always survive — what's broken is the index that points to them. The trick is not to overwrite them before they can be recovered.

!Warning signs
  • The camera shows 'card error' or asks you to format the card
  • Files appear as 0 bytes, or the card looks empty
  • It won't mount on a computer
  • It's stuck read-only or write-protected
Do this
  • Stop shooting immediately — each new photo can overwrite a lost one
  • If it was formatted by mistake, don't reuse the card at all
  • Flip the lock switch to read-only to keep it safe
Avoid this
  • Carrying on using the card
  • Formatting it when prompted to
  • Letting the camera "repair" or rebuild it

We image the card and carve your photos and video out by their file signatures, then rebuild the folder structure — SD, microSD, CF and XQD.

More on memory card recovery →
// mac & macbook recovery

Mac & MacBook recovery guide.

Modern Macs add two complications to recovery. The first is APFS, Apple's file system, which can be left in a broken state after a failed update. The second is the T2 or Apple-silicon security chip, which encrypts the storage — storage that's usually soldered to the logic board. Together they mean your data only exists as readable files while that board is alive, and only if you have the key.

!Warning signs
  • A flashing question-mark folder at boot
  • It won't start after a macOS update
  • Liquid was spilled on it
  • It's stuck asking for your FileVault password or key
Do this
  • Keep your FileVault recovery key safe — without it, encrypted data can't be unlocked by anyone
  • Stop using a liquid-damaged Mac straight away
  • Note your macOS version and what happened
Avoid this
  • Keeping a liquid-damaged board powered — corrosion spreads
  • Reinstalling macOS over your data
  • Assuming the soldered SSD is fine just because the rest of the Mac isn't

We carry out chip-level work to image encrypted Mac storage, rebuild damaged APFS containers, and unlock FileVault volumes with your key.

More on Mac & MacBook recovery →
// laptop & pc recovery

Laptop & PC recovery guide.

When a Windows laptop or PC won't boot, your files are usually fine — the real question is whether the drive is failing or it's just the operating system that's broken. The two need completely different handling, and treating a failing drive like a software glitch is how recoverable data gets lost.

!Warning signs
  • It won't boot, or blue-screens before Windows loads
  • It freezes constantly, then stops booting altogether
  • A SMART warning appears at startup
  • A hard drive clicks, or an SSD has simply vanished
Do this
  • If it's an OS problem, your files are recoverable — get the drive imaged
  • If you see a SMART warning, back up now and replace the drive
  • Check whether it's a hard drive or an SSD — it changes everything
Avoid this
  • Running chkdsk or repair tools on a physically failing drive
  • Reinstalling Windows before recovering your data
  • Rebooting a drive that's clicking

We image the drive, and recover from both failing mechanical hard drives and dead SSDs — Dell, HP, Lenovo and the rest.

More on laptop & PC recovery →
// raid & nas recovery

RAID & NAS recovery guide.

RAID arrays and NAS boxes give you redundancy — the ability to survive a disk failing — but they are not a backup. Trouble starts when a second disk fails, or a rebuild runs onto a disk that's already weak. The single most damaging thing you can do is let the array rebuild or re-initialise onto a failing disk, which can overwrite the very data you're trying to save.

!Warning signs
  • The array shows as degraded, or has dropped offline
  • A Synology or QNAP reports 'volume crashed'
  • A rebuild failed, or the controller has died
  • Two or more disks have failed
Do this
  • Stop — don't let it rebuild or re-initialise
  • Take the disks out and label each with its bay order (1, 2, 3...)
  • Send us every disk, including any that have already failed
Avoid this
  • Rebuilding onto a suspect or failing disk
  • Resetting or re-initialising the NAS
  • Changing the order of the disks, or forcing the array back online
What to send: just the drives, not the enclosure or controller. Take them out yourself and label each one with its slot number — that order is what lets us rebuild the array correctly. Our NAS recovery page covers the popular Synology and QNAP units in more detail.

We image each disk read-only, reconstruct the array's stripe, parity and disk order virtually, then repair the file system on top — vendor-agnostic.

More on RAID recovery →
// before it happens

Protect your data: best practice.

The cheapest recovery is the one you never need. A few habits keep your data safe long before anything fails.

01

Follow the 3-2-1 rule

Keep three copies of anything you can't afford to lose, on two different types of media, with one kept off-site or in the cloud. One drive is never a backup.

02

Test your backups

A backup you've never restored from isn't a backup — it's a hope. Every so often, actually open a file from it and check it works.

03

Act on early warnings

Unusual noises, repeated freezes, files that won't open and SMART warnings are a drive asking for help. Back up and replace it before it fails outright.

04

Mind your SSDs

SSDs erase deleted data within minutes (TRIM), so act fast on accidental deletion. And don't leave one as your only copy unpowered for months — flash slowly loses charge.

05

Handle drives gently

Drops, heat, liquids and static all kill drives. Keep them cushioned, cool and dry, power them down before moving them, and ground yourself before touching bare boards.

06

Protect against power

A surge protector — ideally a UPS for desktops and NAS units — guards against the spikes and sudden cuts that corrupt file systems and fry circuit boards.

// don't believe it

Recovery myths, busted.

The internet is full of "quick fixes" that do more harm than good. Here are the ones we see ruin the most drives.

"Put the failed drive in the freezer."
An old trick that now does far more harm than good — condensation and thermal shock damage the platters and electronics. Keep the drive at room temperature and send it in.
"Recovery software always gets it back."
Software only helps with logical problems on a healthy drive. On a physically failing one it keeps the drive powered and makes things worse. If the drive sounds or behaves wrong, stop.
"A clicking drive just needs a tap."
Clicking is the heads failing, and every spin scrapes the platters a little more. Tapping or shaking it only speeds up the damage. Power it off and leave it alone.
"Deleted files are gone forever."
On a hard drive, deleted data usually survives until it's overwritten — so stop using the drive. On an SSD, TRIM can wipe it within minutes, so act immediately.
"I've got RAID, so I'm backed up."
RAID protects against a disk failing, not against deletion, corruption, ransomware or a failed rebuild. It's redundancy, not a backup — you still need a separate copy.
"Reinstalling Windows or macOS is safe."
A reinstall writes over the very areas your lost files live in. If the data matters, recover it first — then reinstall.
// when you're ready

Not sure what you're dealing with? Let us look.

Every recovery starts with a free written diagnostic. We tell you what's recoverable and what it will cost before any chargeable work — on most jobs, no fix means no fee.

Drop off at Castlemead, Bristol BS1 3AG · or post insured · Mon–Fri 9am–5:30pm
Call us — 0117 332 1137
Mon–Fri · 9am–5:30pm · No fix, no fee
Start a free diagnostic →