You can configure Pega Customer Decision Hub to use repository storage for your Image Library.
Pega Customer Decision Hub Implementation Guide
The Image Library is used to store and maintain marketing digital assets. By default, the assets are stored in a traditional rule-based Image Library. You can instead configure repository storage for your images. Using repository storage for your Image Library gives you the integrated ability to manage and distribute marketing images, improves usability, and simplifies the launch of email campaigns at scale.