In archiving, you are typically setting older content to a read-only state for a period of time so that it can be referred to (but not modified). To do this, follow these steps:
- As either a global admin, site collection administrator, or SharePoint administrator, navigate to a site (modern) or site collection (classic).
- Select the gear icon and select Site settings. If the Site settings option is not visible (for example, in a modern site), you may need to select Site Information and then select View all site settings.
- Under Site Collection Administration, select Site Policies. If Site Policies does not appear, the feature is not activated and you'll need to activate it (select Site Collection Administration ...