On Mar 25, 2009, at 3:34 PM, Neil Laubenthal wrote: > ...but it's actually a cloning program and not a backup program. A cloning program is one kind of backup program. An archival backup program, like Time Machine, is another. Each has its purpose and adherents. Lots of folks use both. (Many of the attorneys in my MacAttorney user group, for instance, use both.) For a thorough discussion of backing up using OS X, and many of the programs for doing so compared, check out: Take Control of Mac OS X Backups $15 e-book 186 pages 1.8 MB download Free downloadable sample available http://www.takecontrolbooks.com/backup-macosx > For most folks . . .backup means multiple copies of files as they > change over time . . . SD does not provide that functionality. Why do you assume that "most folks" prefer an archival type of backup? SuperDuper! is wildly popular among Mac users. I wouldn't be surprised to find that more users use SuperDuper! than Time Machine, even though Time Machine comes with OS X. It would be interesting to take a poll. ___________________________________________ Randy B. Singer Co-author of The Macintosh Bible (4th, 5th, and 6th editions) Macintosh OS X Routine Maintenance http://www.macattorney.com/ts.html ___________________________________________