How often should you backup your data?
The only way to protect a business against valuable data loss is by regular backups. Important files should be backed up at minimum once a week, preferably once every 24 hours. This can be performed manually or automatically.
What files should be backed up?
You don't actually have to back your devices up to iCloud, though it is convenient; you can use a Mac or PC running iTunes instead. … In the future, your iOS device(s) will automatically be backed up to your computer when it is connected, and you won't need to store those backups on your frugal iCloud account.
How many backups should you keep?
The rule is: keep at least three (3) copies of your data, and store two (2) backup copies on different storage media, with one (1) of them located offsite.