My MBA only has a 128GB hard drive, which means that ever since I got it (a few months ago), I haven't been able to do a full iPhone 4 backup, because the iPhone starts transferring my apps to iTunes and there's not enough room on the MBA HD. This hasn't been a big problem, but I just realized that I don't know how I'm going to set up my iPhone 5 when it arrives. I know I could move my iTunes library to an external drive, but I really don't want it to live there. I have iTunes Match so, besides apps, everything fits nicely on my MBA. I want my apps to live on my iPhone and iPad, not on my MBA. Is there a good/easy solution to this? I don't want to sync my iPhone 5 and only have a fraction of my apps put on there, and I don't want to have to re-download them one-by-one from the App Store.