When you configure Artifactory to use PostgreSQL, all the artifact information is stored in PostgreSQL while the artifact binary data is stored in the file system (under $JFROG_HOME/artifactory/var/data/artifactory/filestore).
Note
While it is possible to store BLOBs inside PostgreSQL we do not recommend it. This is important because the PostgreSQL driver does not support streaming BLOBs with unknown length to the database. Therefore, Artifactory temporarily saves deployed files to the filesystem and only then saves the BLOB to the database.