So I'm considering trading in my old MacBook for a MacBook Air. I have a huge photo and music collection, so I was thinking of pairings purchase with a Wifi enabled external hard drive. I don't use my music or photos on the go, so I thought this would be a good option. Does anyone else have a similar setup? I'm concerned about any unforeseen issues. Also, if I keep all my libraries off the MBA, how much free space should I expect to have on the 64gb model! Thanks! I'm trying to see if the MBA is right for me.