Joe's Recommended Basic Strategy

What I recommend for most users is a three-pronged approach: regular (say, weekly) duplicates of your entire hard disk, even more-frequent (say, daily) versioned backups of your data files, and at least one set of media kept off-site (by physically moving it or by using an online backup service). The duplicates will provide a complete, bootable copy of your disk; the versioned backups will pick up all the files that change regularly; and the off-site backups will protect you against the loss of your local backup media. Users with extensive photo or video data may need to go a step or two further due to the large file sizes—separating that data from their main backups and using special strategies to keep it safe ...

Get Take Control of Mac OS X Backups, Fourth Edition now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.