|Is the drive in an external enclosure (probably Seagate)?|
I have known Seagate enclosures fail for no apparent reason; other than the electornics associated with the usb connection and onboard software being a less than reliable item. I had one so; speaking from personal experience. The drive is now in a third-party enclosure and very happy...
Presuming the drive is in an enclosure (whatever brand), If you can remove the drive from the housing and connect via a usb adapter cable to a computer, you may" be lucky enough to discover the drive is actually OK; and that (again) it's the onboard electronics in the housing that has failed in some way.
There are SATA to USB cable sets/adapters on the web; and typically at Amazon. They cost very little... and are useful to have at any time...
This is a link the Amazon.co.uk site; showing typical items:
And this is the one I use for 2.5ins drives: it's been very reliable. It has a wee indicator light to show it's on etc.; unlike many others which don't. It doesn't require external power, being very happy with any standard usb port for both power and signal connection.
If your external drive is the larger 3.5 drive then of course search for one that size.
Use whichever Amazon site is best for you of course to find similar?
message edited by trvlr