In this section, we will have a look at retention rules and how they can be used to sort information that needs to be preserved. Defining retention rules is the first step toward setting up Vault. Retention rules are a set of instructions that direct Vault on what files to keep, and for how long.

There are two types of retention rules, as follows:

• Custom retention rules: These rules allows you to specify the retention period for data that meets specific criteria. 
• Default retention rules: With these, you can define rules that apply to the entire organization. These are only applied when there is no applicable custom rule or legal hold.

To set up retention rules, click Retention on Vault's left menu, as shown in the following screenshot: