A drive fails, or a folder full of the wrong thing gets deleted, and the instinct is to do something — run a tool, reboot, try to fix it. That first hour of doing something is where most recoverable data is actually lost. The good news: the right first moves are simple, and mostly involve doing less, not more. Here’s what protects your files while you work out your next step.
Almost every mistake comes from acting before diagnosing. Stopping is not giving up — it’s the single best thing you can do for the data.
Whatever happened, the first move is the same: stop writing to the drive. On a deletion, the files you want are still sitting on the disk, marked only as space that’s free to reuse — and every new file you save, every program that writes a temporary file, every automatic update risks landing on top of them. On a failing drive, every extra minute of spinning is more wear on a component that’s already going. So if the lost data is on your main system drive, the safest thing is to shut the computer down rather than keep working on it and hope. If it’s on an external drive, a second internal drive, a memory card or a USB stick, unplug it and set it aside. The urge to keep poking at it is strong. Resist it — the drive being idle is the drive being preserved.
When Windows offers to check and repair a drive, or you find advice online to run chkdsk, it’s tempting to let it. On a healthy drive with a minor logical hiccup, that’s sometimes fine. On a physically failing drive, it can be the moment a recoverable situation becomes a partial one. Repair tools assume the hardware works; they hammer away at the failing areas, rewrite parts of the file system, and can overwrite the very data you’re trying to save, all in the name of “fixing” the disk. The trouble is that from the outside you often can’t tell a logical problem from a physical one — a drive that’s slow and throwing errors could be either. If the data matters, don’t gamble the diagnosis on a repair tool. The same caution applies to recovery software: some of it is fine on a healthy drive, but running it on a drive that’s clicking or struggling stresses the exact thing that needs to survive.
A drive or card that suddenly asks to be formatted, or shows up empty when you know it was full, sends people into a panic — and sometimes into clicking “format” because the computer suggested it. Don’t. That message almost never means the data is gone; it means the file system — the index that organises the data — is damaged, while the files themselves sit intact behind it. Formatting builds a fresh, empty index on top and makes the recovery harder. The same goes for reinstalling the operating system to “get the computer working again”: if your lost files are on that drive, a reinstall writes over them. When a drive reads as unformatted or empty, the move is to stop and get it looked at, not to accept the fix the computer is offering.
Doing less doesn’t mean doing nothing. A few things are genuinely safe and worth trying first. Check your backups properly — not just whether you have one, but whether it actually contains the files you’re missing and isn’t itself out of date. Check the cloud: photos you thought were only on a dead phone are often sitting in an iCloud or Google account; documents may be in OneDrive or Dropbox. Look in the recycle bin or trash, which is the one undo that costs nothing. If it’s an external drive that won’t show up, it’s reasonable to try a different cable or a different USB port once — the fault is sometimes in the lead or the port, not the drive — but if that doesn’t work, stop there rather than trying enclosure after enclosure. What you’re doing at this stage is ruling out the easy explanations, not attempting surgery.
If the backups don’t have it, the cloud doesn’t have it, and the drive is clicking, not spinning, not being recognised, or reading as corrupted, that’s the point to hand it to someone who does this for a living — before anything else touches it. A free diagnostic will tell you what state the drive is really in and what recovery would cost, with no obligation and, on most jobs, nothing to pay unless it works. The reason to come in sooner rather than later isn’t sales pressure; it’s that the odds are best on a drive that’s been left alone since it failed, and they get worse with every well-meant attempt to fix it. You’re welcome to drop the drive at the Princes Street lab, or post it to us insured from anywhere in Scotland — and if you’re not sure whether it’s worth bringing in, a phone call to talk it through costs nothing either.