ui/v2.5/src/docs/en/ReleaseNotes/v0200.md
The image data subsystem has been reworked in this release. Existing systems will have their storage system set to Database, which stores all image data in the database. This can be changed in the System Settings page. Note: a migration is required to change the storage system, and can be accessed from the Tasks page.
The Database storage system is not recommended for large libraries, as it can cause performance issues. The Filesystem storage system is recommended for large libraries, and is the default for new systems.
Important: the generated/screenshots jpg files are considered legacy. These files can be migrated into the blob storage system by running the Migrate Screenshots task from the Tasks page. Once migrated, these files can be deleted. The files can be optionally deleted during the migration.
The cache directory is now required if using HLS/DASH streaming. Please set the cache directory in the System Settings page.