Can the Time Capsule back itself up onto a USB-connected HDD?

I am interested in purchasing a Time Capsule, and want it to be the only place some of my files are stored. In other words, if it crashed, I would forever lose the files.

If I purchase a 3 GB Time Capsule, and connect a 3 GB drive to the USB port, is there intelligence in the Time Capsule to copy the files to this secondary drive automatically? I do not care if it is fast, as my primary access point would be the internal TimeCapsule drive. I just want it backed up in near real-time (same day is good enough).

Please only answer in the affirmative if you have already set this up and it worked.

QA Apple Time Capsule

QA Apple Time Capsule

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