External Hard Drive really slow, Problems with bad sectors

I have this drive for 18 months.
I worked really great and there are 300 gigs on this external hdd.
It's WD ELEMENTS SE 1TB WDBABV0010BBK-EESN

The drive it self is very slow It takes long minutes to appear in windows explorer and navigating in it is also very slow.

file transfer speeds are roughly 1mb/s if not worse.
I have this data:

http://ufu.co.il/files/bxegui1cvzw3y6b1v92w.png
(I never ran a test, this showed up the first time I opened it)

What Can I do ? Is there any way I can get my hard drive working again? and if not how can I save the information ?

Golden said:

Reallocated sector count problems usually point to a failing drive, and you should consider replacing it.

In the interim, you can do the following which might provide some relief by performing a chkdsk on the drive as detailed here:
Disk Check

Longer term though, this drive will eventually fail, so replace it as soon as you can.

I tried chkdsk, It ran for 12 hours and I think it is stuck now "774 files processed"

http://ufu.co.il/files/egyb3ry8vxuf4tpd09tw.png
I will replace this drive.
But how can I save the 300gb I have on this drive ?

Golden said:

Copy it to the new external drive

how ? transfer speeds are 1mb...It's not possible.

That is why you need to make backups of important files BEFORE problems develop. If you wait till after it may be too late.