> ## Documentation Index > Fetch the complete documentation index at: https://docs.webdock.dev/llms.txt > Use this file to discover all available pages before exploring further. # Persistent storage > Understand application data retention, storage allowances and deletion. Applications with an approved persistent-storage allocation use a fixed-size volume mounted at `/data`. Keep durable application files there rather than in the container's temporary filesystem. ## Capacity and lifecycle Storage requires a compatible storage agent and enough customer and cluster capacity. The fixed-volume model supports one application replica. Do not assume several replicas can safely share the volume. | Action | Effect on persistent data | | - | - | | Stop or restart | Retains the volume | | Delete application | Retains data and its storage accounting | | Purge retained storage | Permanently destroys the selected data | Retained data continues to consume capacity. An authorized platform administrator reviews the separate purge action. ## Backups and availability A retained volume is not a backup. This storage model does not by itself provide replication, automatic cross-node failover or a restore service. Confirm the backup and recovery arrangements for your application. Export data with an application-consistent procedure before a destructive change. Copying a database file while it is being written may not produce a usable backup. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.