My Seagate Expansion Portable drive cannot be detected and light is blinking.

[Kanak Thacker]

I used this hard disk a few days ago but suddenly it is not getting detected in any of the computers or laptops, I can see the green light blinking and feel the vibrations inside the disk.It is not in the warranty period.
Can someone please provide with a solution as I've a lot of data in it

 

[Boogieman_WD]

Hey there, Kanak.
Have you tried the drive with a different USB cable (not longer than 12"), just in case?
You could try to access the HDD with Linux Live CD/USB to see if it's able to recognize it properly, so that you could get your data. Here's a link to a thread with a couple of data recovery programs, which might prove useful as well: http://www.tomshardware.co.uk/forum/id-1644496/lost-data-recovery.html
If you manage to get your data back, I'd recommend that you download the manufacturer's diagnostic tool and test the drive, to see what's the situation with it. But note that this should be done only after you don't have any data left to recover, if the HDD has physical damage, testing and scanning it might further damage the drive and make it harder for you to get your data back.
Another option is to try and take the drive out of its enclosure and connect it internally to a computer via a SATA connection to see if you're able to access it this way. But this is usually not recommended and should be done only as a last resort. You could still try a data recovery company, this would be the most reliable option, although it might be a bit expensive sometimes.

Hope that helps.
Boogieman_WD