Unaccessible Drive. I just got this external hard drive. When I plugged it in, everything loaded

Question

I just got this external hard drive. When I plugged it in, everything loaded up on it's own. I needed to reimage my computer. I synced all the info i needed to the hard drive and had my computer reimaged. I plugged the hard drive back in after the reimage and it recognizes the hard drive, but won't autorun the launch.exe application on the drive. I can't view it on my computer and I haven't been able to locate a similar download on the internet to do the same job. Any suggestions?