Question : Looking for software to mirror two external hard drives.

We have two USB hard drives that we need to mirror.  One hard drive is used to store RAW picture files within folders, and we would like to be able to plug in another hard drive into the same machine and a software find and update the changes so that each hard drive is an exact clone of the other.  We would need this to work on XP, Vista and 7.

Answer : Looking for software to mirror two external hard drives.

This device does what your looking for.

http://www.amazon.com/Western-Digital-Book-Mirror-WDH2U20000N/dp/B001B8RSAK