Problems accessing portable hard drive

Good day,

I have a Toshiba portable hard drive and an Asus laptop with windows 8.

A couple of days ago I was playing a game on steam, which I have downloaded onto the portable hard drive. In the middle of playing the game my hard drive fell and disconnected obviously causing the game to crash. I quickly reconnected the hard the hard drive, exited the crashed game and attempted to restart steam. However, when I went into my computer to access the hard drive there was a problem. While my computer was detecting the portable hard drive it was not showing how much memory was in use compared to total available space as it does with the other drives available on my computer. When I try to access the hard drive in simply makes my desktop crash momentarily before everything restarts.

I have tried using disk management to see if the hard drive shows up however sometimes it does not even show the hard drives being read by the computer and gets stuck trying to access them. The few times it does show all the hard drives it shows the portable hard drive as having an error and does not show anything in the available memory area. When I use device manager the hard drives shows up and says that it is working properly when I look at the properties, however as explained above it is not.

I will not have access to the internet with my laptop for a while so if their are any fixes I can do locally they would be greatly appreciated. If I do have to download a program, patch or anything else like that I will also appreciate those as I will eventually have access to the internet. If the problem is unfix able I was also wondering if their was a way for me to retrieve the files on the hard drive and move them to my computer so i could still have access to them.

Thank you very much