I’ve been to Memory Worlds from Proxima Centauri to Wolfenheim and beyond. I’ve visited ones operated by the Peloran and even the Aesiran cybers who have grown up since War’s End. I’ve looked out upon the blackness of intergalactic space from a Memory World on the very top of the Orion Arm of the galaxy. And I’ve gazed upon thousands of stars packed into stellar clusters. You can find a Memory World just about anywhere near space we’ve settled. Assuming they like you. Even they don’t know where all the Memory Worlds are. That’s a security precaution in case one of them turns. They don’t want any single being in the universe to know where all of their backups are. Where all of our backups are. Some people think they’re a bit paranoid. I do not.