You must link an Archiver to the ALPR Manager to store the ALPR images that are associated with the reads and hits.
What you should know
Each Archiver role must store video on a separate drive or partition from other Archiver roles. If you are unable to have separate Archiver roles, you can manage both ALPR and video data with the same Archiver. Note that by default, the Archiver deletes the oldest files when its disks become full. This means that ALPR images might be deleted before their retention period is over. This does not affect ALPR metadata or the protected events and images.