I know that the time capsule is a hard disc plus an Air Port base station. Is it more than that? Does it work more seamlessly than a run-of-the-mill external hard disc? I want a hard disc that will automatically back up my MacBook Pro whenever the MBP is within range of the hard disc, and I want the data transfer to be secure (I will be doing this in a dorm with people who like packet sniffing for no reason). Does the Time Capsule do this nicely, right out of the box? More importantly, could I get a DIFFERENT third-party hard disc to do the same thing? The 500GB Time Capsule is $300. Western Digital sells a 500GB mirrored pair of drives (1TB if you turn off the mirroring) for only $244. That is twice the storage OR twice the reliability (I would opt for the reliability) for $56 less. As far as I know, I would have to plug in the drive via USB every night, but to save some money I think it might be worth it. Also, if I got the Time Capsule and set it to back up continuously when connected and to search continuously when not connected, might that slow down my computer? What if I put the computer to sleep at work, bring it home and don't open it at home. Will it still connect to the Time Capsule and back up, or do I have to "wake it up" at home? Thanks.