You plug in your Seagate Expansion, Backup Plus or One Touch drive and nothing happens. The light may come on, Windows may make its connection sound, but no drive appears in File Explorer or Finder. The cause can be anything from a worn-out cable to a serious fault inside the drive. A few simple checks are safe. Several of the “fixes” suggested online are not, so it is worth knowing which is which before you try anything.
What the symptoms can tell you
How the drive behaves gives a useful clue about where the problem lies:
- Light on, no drive letter, nothing in Disk Management. This may be a cable or USB problem, a failed USB interface board in the case, or a drive that is not starting up properly.
- Shows in Disk Management as “Not Initialized” or “Unknown”. The computer can see the hardware but cannot read the start of the disk. Bad sectors, firmware problems and a failing USB board can all cause this.
- Appears, then File Explorer freezes or shows “Not Responding”. The drive is struggling to read and keeps retrying. This often points to weak read heads or a damaged disk surface.
- Clicking, chirping or beeping. Usually a mechanical fault. Stop powering it on.
- “USB device not recognised”. This can be the cable, the port or the USB board, but it can also mean the drive inside is not responding.
Safe checks to try first
These do not write anything to the drive, so they are fine to try once or twice:
- Use a different USB cable. The short cables supplied with portable drives wear out, and the small connector on the drive end is easily strained.
- Plug straight into a USB port on the computer, not a hub or keyboard. Portable drives take all their power from the port, and a weak port may not start them.
- Try a second computer, ideally with a different operating system.
- For desktop models such as the Expansion Desktop, check the mains adapter and make sure you are using the original one. An adapter with the wrong voltage can damage the electronics.
- Open Disk Management in Windows or Disk Utility on a Mac and look, without clicking anything, to see whether the drive is listed and at what size.
If it turns up and your files are readable, copy the most important ones to another disk straight away, before doing anything else. A drive that has just had a funny turn may not give you a second chance.
Why these drives can fail without warning
Most Seagate external drives are made of two parts: a standard SATA hard drive and a small USB interface board inside the plastic case. Either can fail. If only the USB board has died, the disk may be undamaged, although this should be confirmed by someone who knows the model, because some password-protected Seagate drives use hardware encryption tied to that board. Taking the case apart can also crack the clips or damage the connector.
Many 2.5-inch portable models contain drives from Seagate’s Rosewood family, such as the ST2000LM007. These pack a lot of data into a slim drive and rely heavily on their firmware, the drive’s own internal software. When that firmware has a problem the drive may spin normally and still refuse to give up data, or show as busy indefinitely. Our guide to unlocking Seagate F3 Rosewood drives explains more about the technical side. Repairs of this kind need specialist equipment working directly with the drive’s firmware, and they are not something ordinary software can do.
What not to do
- Do not click Initialize or Format. Windows may offer both. Each writes to the disk and can make recovery harder.
- Do not run CHKDSK or repair tools. They assume the hardware is healthy. On a failing drive they add hours of strain, and they can change the file system, as we explain in our article on files missing after CHKDSK.
- Do not leave recovery software scanning for hours. A full scan reads every part of the disk. If the heads are weak, that can turn a recoverable drive into a badly scratched one.
- Do not tap it, freeze it or keep replugging it. Each power cycle is another chance for the heads to do damage.
- Do not open the drive itself. A hard drive’s sealed section should only be opened in a clean room, as dust on the platters causes permanent damage.
When to stop and get help
If the safe checks have not worked, or the drive makes unusual noises, unplug it and stop there. The same applies if the files on it are irreplaceable, whatever the symptoms. The first job is to establish what has actually failed: the USB board, the firmware or the mechanics of the drive. A mechanical fault has to be dealt with in a clean room, which we have here in London. You can find out more about our hard drive data recovery in London.
Seagate drive not showing up? Talk to us
Unplug the drive and keep it somewhere safe. Call Data Doctor on 020 7394 2529 for a free initial consultation, or bring it to us at Unit 1 The Willows, 80 Willow Walk, London SE1 5SY.