Attach to telly via HDMI cable (for best results). Connect to networked computers via ethernet cable to modem (some media players are wifi enabled) & stream video, music etc back & forth. Can be used as bog standard external drive but then might as well just go for that. Thats as much as I know & even that might not be right
Edit: forget that bit about using it as external hard drive it doesn't say it has a built in hard drive like some I have seen.