Since the base model only has 256GB, this seems like the easiest and cheapest solution for more space. I need a new router anyways, and I'd like something I could just leave on and forget about. I've never used a wireless external drive though. When the Time Capsule is online, will it just show up on my Mac as an external HDD? I'd mostly use it for my iTunes library and backups. Would it work well for that? Thanks for any help!