Ok so after much back and forth between a 2012 refurb MacBook Pro retina 13" and the 2013 MacBook Air 13" (base models), I've decided to go with the air. I can notice the half pound of extra weight and the extra battery is good for me. If I could stretch to a 2013 rmpb maybe the decision would be more difficult but I can't. Anyway I have a question about wireless networking. Right now I have a pocket wifi mobile hotspot which I use with my appletv and iPhone and ipad. I want to add network storage (nas?) but I can't connect to the nas via Ethernet, can I connect to it with only wifi. So is this still possible without a wired connection. For instance apple time machine or equivalent connected to the mobile hot spot as well as the appletv and my new MacBook Air. Can I send files wirelessly to the time machine from the air without having the time machine connected directly via Ethernet to a router (wifi only). I'm not so worried about data charges as when I stream via airplay it doesn't use my bandwidth as it's only over a local area network (wifi) not via internet. For those who ask why I don't get a home connection the problem is I live in Japan. I have to pay line rental plus a 5 year contract with the ISP which I don't want to do. I hope this is somewhat clear, any help would be great.