External HDD trouble

[aldo2332]

I have a 4tb HDD (mains powered) which i used to use on my old vu+ duo which worked fine. I plug it into my xtrend via usb port at the rear. I dont want to initialize as im not wanting to wipe nearly 4000GB of data i have stored. music/movies,etc.

If i check HDD
i get an error:
/dev/sdb1 contains ntfs file system labelled 'seagate expansion Drive'
fsck.ext3: Bad magic number in super-block while trying to open /dev/sdb1

Any help on this please?

Alsoif i go to mount manager it says its unavailable