I was traveling and brought my mac air. people I was traveling with brought a 1TB hard drive and my air would not allow anything to be written to it. We want to share pictures back and forth. NOW I am home, and my 1TB that I traveled with and copied pictures to from my air I am attaching to her PC and it won't recognize it. This is a slight hassle!!! what can I do to be able to use my seagate 1TB travel harddrive and be able: 1. Copy pictures from the seagate to the PC 2. USE my air and have a external hard drive be able to be recognized and be able to write to it. Basically just trying to: 1. copy pics from my air/or mac or 1TB drive to her pc 2. copy her pics from her 1TB drive to my mac or air. This should be simple.