How to export many .mov files as one file from iPhoto onto an external hard drive
I have about 176 .mov movie files that I combined into an album on iPhoto 9.6.1 (on OS X Yosemite, 10.10.2). I then created a saved slideshow for those same .mov files. This slideshow then plays like a single movie on the computer. I want to back up my movies as one file on an external hard drive. I have a 1 terabyte external hard drive. I tried exporting the slideshow, but it is taking forever and I'm not sure it is even working. I installed Caffeine to keep the computer awake, but I doubt this will solve my problems. Should I be using iMovie instead or something else that I should purchase? I was able to move all the individual .mov files to the external hard drive, but to play them back, I don't want 176 files, but one combined file. Thanks!
Mac Pro, OS X Yosemite (10.10.2)