How to Safely Store and Delete Per-User AI Images in Object Storage

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A structured key naming convention — using user ID, generation month, and a UUID — is recommended for storing AI-generated images in object storage, ensuring efficient listing and deletion. Object storage has no true folders, only key prefixes, meaning the organizational layout must be deliberately designed by the developer. Application-side deletion should handle explicit events like account closures or moderation actions, while lifecycle rules are better suited for cleaning up temporary files such as scratch renders. A common failure occurs when database rows and storage objects are deleted out of sync, potentially leaving orphaned files that remain billable and accessible via signed URLs. Running a weekly reconciliation job that cross-checks storage prefixes against the database index is advised as the most reliable way to catch and resolve such inconsistencies.

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