I have been thinking about updating my storage and back up set-up for a while now and wanted to get someone else's opinion. Basically I have a MBP and I want to be able to access an external disk everywhere I go in my house. My first thought was a NAS, but I have heard there are problems getting time machine set up on one. My other idea was to use my current external drive connected to a router with a usb port. Which would be better for my situation? And what hardware would you suggest?