The D-Link DNS-323 is a terrible device. It was a waste of time and money for me. Dumps data just by powering it off & on. Tigerdirect will not refund me my money because it is a programming error on the unit. D-Link will not issue a refund because they don't refund people for their products and only tell you to contact the seller, Tigerdirect.
I could barely hear Tech Support and their phone system dumped me 2 times, both times the Tech Support tech was talking to me mid-sentence.
For more on my experience with a D-Link DNS-323 go to http://www.broadbandgis.com/public/DNS323.pdf.
This device should not be used to back-up data!!!