"MyBook World Edition 1TB is available for $320.00"3.5 starson by rhd1953
Pros: Ethernet connection, 2 500 GB harddrives for 1 TB of storage. Simple stand alone networked storage.
Cons: Extremely noisy cooling. Buy aTargus 'Chill Mat' for $19.00, put your MyBook on it and the noisy MyBook fan stays off. The hard drives are not easily swapped, must be sent to Western Digital.
Summary: Buy the 1 terabyte version at Best Buy for $320.00.
Data transfer rate via ethernet is ok, you can watch video or listen to music. You can't transfer big files and access (play) video/music at the same time! I have 600 GB on MyBook right now.
The 1 TB MyBook has a very noisy cooling fan, which runs at room temperatures of +75 degF. I bought a $19.00 Targus 'Chill Mat' (2 quiet cooling fans) for notebooks, placed MyBook on it and the MyBook cooling fan stays off. Can't hear the 'Chill Mat' fans at all.
Use of standard Western Digital SATA 500 GB drives for replacement would be handier.