Summary: My Apple Time Capsule crashed as soon as it was out of warranty. This 4TB drive is a superb replacement. I have it operating as a Raid 1 Firewire connected system using the Apple Time Machine software. I also made additional copies of my Music and Photo collections so as to have access to them in the event of the Apple software giving trouble in the future. The silence of the drive is astonishing. Well Done WD.
Pros: Attractive Design, Easy To Setup, Easy to use, High Capacity, Quiet
Summary: I consider my self computer literate and I have not been able to install the SW for the aplications related to the external disk. I went to their website, dowloaded the SW and that did not work either. It is useless. I previously purshased an external disk of 2 TB from WD and that one worked fine.
Summary: I got this external hard drive to back up my 1TB iMac via Time Machine. It works well and the software integrates easily. The FireWire 800 cable was supplied and it was the first time I got to use this port so I was pretty excited, but it did not run as fast as I thought it would. Still faster than the average though. Only issue I had with this unit was that the manufacturer did not tighten the case all the way and I have a little tab that sticks out the top.