My girlfriend and I each both have a new Mac. Since mine is the iMac version I would like to make it easy when going in for an apple one to one appointment together. We want help with making and importing videos. I have a ton of home video on my iMac. I back up to an external HDD using TM. Can I bring in my external HDD, as is and work on my stuff at the apple store? She has a MBP, so for her it's easy. I want to avoid having to lug my iMac into the mall.