NOTE: This only applies when backing up to Amazon.
When you added your Amazon account as a destination, you gave Arq a "key pair". If you had created an administrator IAM user as demonstrated in our video, you can now easily create a custom IAM user with just enough permission to back up your files.
Click "Preferences" from Arq's menu. Then click the Destinations tab:
Double-click your destination and click the "Create Restricted IAM User" button:
Arq will create a new IAM user in your Amazon account, assign it just enough permission to read/write your computer's backup data, and switch to using that IAM user. Once this is complete, you can delete the original admin IAM user via the Amazon console.