Seagate External Hard Drive does not work on Yosemite
I have recently downloaded Yosemite on my Mac. I have a Seagate external hard drive that I store all my pictures on. I can no longer access the folder on this drive where all my pictures are located. Does someone know how to fix this problem? This is making me sick to my stomach as I have thousands of pictures on this device. TIA
MacBook Pro, OS X Yosemite (10.10)