Is my external HDD buggered?

[biron_w]

It's a buffalo HD-E1.0TU2-UK. Mains powered.
Until today I had no problems but i've just tried to use it and it won't turn on.
I can hear a very quiet clicking noise. But that's it.
Is it worth buying a new PSU to see if that will get it working? Or is it broken?
If it is broken how can I recover the data?
I really hope it isn't broken as i've got loads of photo's on it

 

[biron_w]

This is my backup! I bought it in case something happened to the hard drive in my laptop.

 

[biron_w]

Backup the backups

And what happens when the backup of the backup fails?
I'll see if I can recover the data somehow if the drive is busted.