It is important to do regular supports of your critical information.

You have to glide an incremental backup every day (only what has been updated), with an entire support at least once a week.

Do not forget to verify these supports once a month. Also, insure of having to hand the necessary software to restore the support when I needed it.

Really to protect your critical information, he considers to keep some of his backups further possibly of your place of work, for example, in a safe in the bank, in your house, etc.