Yesterday my friend brought over an old HDD for me to format for him. So I unplugged one of mine, plugged his in, and did the formatting. I turned my PC off and went out of the room. He took out his drive and plugged mine back in. I came back and turned my PC on, and when I went into My Computer, my second drive is no longer there. It is found in Device Manager and in Disk Management, where it is labeled as unallocated. So somehow it thinks its a new drive, but it is nearly full with information that I need.
Is there anyway I can get the computer to detect it properly, or get the info off with a free tool?