This is a quick-start guide to using Safe Offsite Backups. (Actually, this is the full guide: it's just fundamentally quick to use.)
Create a new user.
AmazonS3ReadOnlyAccess
PolicyAttach the read-only policy. You may optionally restrict this to just buckets you want backed up.
Select "Application running outside AWS".
We will now sync this bucket every hour and store snapshots for 7 days.
Sit back and enjoy the peace of mind!