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# Overview

Certain management operations require a specific upgrade or content update (`.enc`) file, or a certificate. Other operations, such as viewing logs, require you to load the logs to a Log repository. ArcSight Management Center can also maintain centralized repositories for files needed for host configuration and management.

By default, a number of pre-defined repositories are provided. However, you can create more repositories to suit your needs. Any repositories you create are referred to as user-defined repositories.

The following controls are used for repository functions:

- Retrieve Container Files copies a file from one or more managed hosts to the repository.

- Upload to Repository sends a file from your local computer (the computer running the browser) or a network host accessible from your local computer to the repository.

- Retrieve downloads a file from the repository.

- Upload copies a file from the repository to one or more managed nodes.

You can perform these operations using repositories:

- Manage logs in the Logs repository

- Manage CA certificates in the CA Certs repository

- Upgrade a connector using an upgrade file available in the Upgrade repository

- Apply a Content ArcSight Update Pack (AUP) on one or more connectors

- Maintain centralized repositories of files for connector configuration and management