Buffalo and Hard Drive Recovery

The laptop would initially boot up but pop up with a Windows automatic recovery attempt screen.
After a couple of attempt spots at this, the hdd stops being recognised by the bios and would make a light clicking noise.
The drive is a seagate 1tb laptop drive. My problems with data recovery and faulty hard drives got worse so I consulted the hard drive recovery specialists at The Data Clinic

Buffalo external HD 500 S
which is probably a third to half full – all family photos (from when children were born til last year) and documents.
It may have been dropped – its not firing up – I can hear a few clicks and then a beep.
No laptop will recognise it (have tried several and different usb leads and ports).
Can you help to retrieve the data please? or would there be a risk of losing it all if you open the case?
How much would it cost me?

I dropped my Seagate 2T external drive. A few minutes later y plugged it in to my computer, I was able to open it and when through some of files to make sure it was working fine. After that I tried copying a file and it started making a beeping noise, I tried ejecting it but it wouldn’t let me so I unplugged it. I plugged it back in but now my computer won’t recognize it, plus it kept on making that mechanical beeping sound. I will be in London for 3 days and I wanted to know how long it would take for the diagnosis and the recovery/repair. If it’s more than 3 days, do you ship within Europe?
Thanks in advance.

Lost power cord to external hard drive bought in Japan in 2007. Could not find replacement so brought drive to a shop to transfer data to another hard drive but was told that disk is damaged. I spoke to one of your advisors earlier today about an external hard-drive which is failing to mount, and so would like to arrange collection of the drive tomorrow. If you could ring or email back soon that would be great.