You plug the drive in, the light comes on, and nothing appears. For a lot of people that drive is the only copy of ten years of photos, so the next few minutes matter. We see external drives every week at our Bentleigh East workshop, and the good news is that more than half of them are not faulty at all. The bad news is that a few of the common home remedies can turn a recoverable drive into an expensive one. Here is how we approach it.
Symptoms and what they usually point to
The way the drive fails tells you a lot before any tools come out.
- Light on, drive spins, but nothing shows in File Explorer or Finder: most often a drive-letter clash, a corrupted partition table or a file system the computer cannot read, such as a Mac-formatted drive on a Windows PC.
- Drive shows up, then disappears a few seconds later: a weak USB cable, an underpowered port, or a drive that is drawing too much current because the motor is struggling.
- No light, no sound: a dead USB bridge board inside the enclosure, a broken connector, or a drive that has lost its power supply. The platters inside are usually fine.
- Clicking, ticking or a repeated spin-up and spin-down: a mechanical fault in the read heads. Stop here. Every extra power cycle risks scoring the platters.
- Drive appears but asks to be formatted or shows the wrong size: the file system is damaged but the data is almost always still there.
What to try at home first
These are safe for any drive that is not making unusual noises. If it is clicking or grinding, skip straight to the next section.
- Try a different cable and a different USB port, and plug directly into the computer rather than through a hub. On a desktop, use a port on the back of the case.
- Try another computer. If the drive appears on a Mac but not a PC, or the other way round, the drive is fine and the file system is the issue.
- On Windows, open Disk Management and look for the drive. If it is there without a letter, assigning one fixes it. If it shows as unallocated or RAW, do not initialise or format it; that writes over the partition information you need.
- On a Mac, open Disk Utility. A greyed-out volume can often be mounted manually. Again, do not erase.
How we diagnose and fix it
We start by taking the drive out of the equation. The bare disk goes onto a bench SATA or NVMe interface so we can see whether the problem is the enclosure electronics or the drive itself. A surprising number of “dead” externals are just a failed USB-to-SATA bridge, and the drive reads perfectly once bypassed. From there we check the SMART health data, which records reallocated sectors, read errors and the drive’s own view of its condition.
If the file system is damaged, we image the drive first and work on the copy. Repairs to partition tables and directory structures happen on the image, never on the original, so a mistake costs nothing. For drives with physical faults, imaging is done with hardware that can read around bad areas and back off when the drive struggles, rather than hammering a failing head. Head swaps and other mechanical repairs are clean-room work, and we say so upfront.
Cost and time in general terms
A drive that only needs a new enclosure or a file system repair is usually back to you within a day or two, and the cost sits at the low end of what we charge for data work. Logical recovery from a corrupted or accidentally formatted drive takes longer because imaging a few terabytes cannot be rushed. Physical recovery is the most involved and is quoted after assessment. We give you a clear picture before any recovery starts. For the full process, see our data recovery page.
When to bring it in
Bring the drive in straight away if it is making any unusual noise, if it has been dropped, or if the data on it does not exist anywhere else. Bring it in after the home checks if it still refuses to appear, or if it appears but asks to be formatted. If the drive is fine and it was the computer that failed to see it, our computer repair team can sort the USB or driver issue while you wait. And once it is all back, talk to us about a proper backup or NAS setup so one drive is never the only copy again.
Frequently asked questions
Can I recover the files myself with free software?
Sometimes, if the fault is purely logical and the drive is healthy. The risk is that recovery software scans the whole drive repeatedly, which is exactly what a weak drive cannot cope with. If the data matters, image first or let us do it.
The drive asks me to format it. Should I?
No. Formatting writes a new, empty file system over the old one. A quick format leaves most of the data in place, but a full format or an initialisation can make recovery much harder.
Is the data gone if the drive was dropped?
Not necessarily. Many dropped drives have a head or spindle fault that a clean-room recovery can address. The key is not to keep powering it on and hoping.
How long do external drives last?
Mechanical portable drives commonly fail between three and six years, often from being knocked while running. SSD externals last longer but fail without warning, so neither should be the only copy of anything.
Melbourne IT Services is at 2 Bellevue Road, Bentleigh East VIC 3165, with parking at the door. We are open seven days from 5am to 11pm. Call or text 0421 388 876 and bring the drive in; we will tell you where you stand before anything is touched.
