These forums are full of people who thought an external HDD is useful as STORAGE. It isn't really. It's a nice way to move data between systems. And it's quite useful as one of a range of backup media. But it certainly isn't a good place to store 450 GB of data you have no other copy of and don't want to lose.
That being said, try the programs mentioned in post #3 of the forum sticky:
Use them to recover the data to your internal hard disk. If that doesn't have 450 GB available, better find a PC that does have that space before starting or add a second internal hard disk of at least 500 GB to your current PC.
I have a Seagate FreeAgent Go 500GB (direct USB)
Everything was working fine until I started transferring some data to my ext hdd and system got hanged so i had to remove the cable directly ( I have to say that i have done that a lot of times which i know is wrong )
So when I put the cable in again it says the drive needs to be formatted to be used again. I selected cancel because i have almost 450gb of data in it which i didnt want to lose.
After that in My Computer all I see is Local Drive H (as it shold be) but without any info of the size and free space in it (like it normally does) unlike my internal drives.
When i try to open it, my system hangs . (specifically explorer.exe stops working) Same happens when i try to right click on it.
I tried to download some troubleshooting software from seagate site (SeaTools) but the program keeps showing "scanning for supported drives" for eternity (which otherwise shows my internal drives if i have not connected my external drive)
When i go to disk manage again everything hangs and shows not responding.
I tried to feel if the drive is moving inside. Initially as soon as i connect i can feel a slight movement inside (probably not as much as it was before but i cant be certain about that) and after a few min everything stops moving (maybe when the hdd is not in use it goes into this state, or maybe theres some prob..cant be certain)
Is there anything i can do to get my hdd working again? If not, is there a way of recovering the data back?