How often, and how much? Decide by thinking through how you would use your backup to restore your Mac after disaster.
Time Machine
Don’t you want to search your backups? Like it or not, Spotlight will still index them, even if it doesn’t tell you that it is.
When should you create a new user, and how should you delete them?
A second hard drive failure in my Promise Pegasus RAID system forces some choices.
Is it a good idea to let your laptop back itself up to its startup drive?
Have you just got a new Mac, or have you just ordered one to replace an old, ailing, or dead one? Here is advice on making the move from old to new.
How I recovered my broken RAID backups, and got everything working again.
Even the most disorganised adult has some system of discriminating what things are most important – but not computers.
My external drive hosting Time Machine backups cannot be ejected, so I switch it off or pull the cable. How can I stop Spotlight from indexing it?
How can I find an old phone number in my Time Machine backup?
The Eclectic Light Company 