A large storage (2TB) for a very reasonable price. Accessible from everywhere, both on the domestic network from anywhere via a web interface (for PC, Mac and Linux) or Android & iPhone apps (for phone and tablets) that work wonderfully. On the domestic network, watch video stored on the NAS is no problem, even in HD. Same roaming but then it depends on your Internet connection to your home (upload). All stored files are accessible from anywhere. Customizable profiles and safety at will.
Only flaw: the web interface uses (not top safety level but I do not work for the secret service, either) -D