Backup program which one for this example? I have a iMac duo and a MBP duo. One of the biggest problems I face is keeping my photos, music, & documents synced between the two. Is there a backup program out there that I could install on both machines and would check to see if any of the folders have changed and update them as necessary? the reason I ask my music is over 60 gigs now with itunes videos and my photos are approaching around 6 gigs, so that takes forever over a G network. thanks.