If you use it a lot, depending on the brand/quality they don't last that long. I've gone through 2 of them, with the same old IDE drive inside.
You can check the case, if you have another drive to put it in.
> Would anyone know the reason why my external HDD is suddenly not connecting with
> my laptop? Its a HDD out fo my old tower pc put into an external case, its been
> working fine for months and today it just will not appear in My Computer, it
> does come up with an icon near the clock to safely remove the device though. The
> My Computer screen has frozen a couple of times while ive been trying to get it
> to connect. It has all my music on it, like 60GB worth.