Reading Time: 3 minutes Veeam Backup Catalog is a feature of Veeam Backup & Replication that stands for VM guest OS file indexing. Veeam Guest Catalog service on backup server works as a local catalog service. It collects index data for backup jobs on this specific backup server and stores this data locally in the Veeam Backup Catalog folder. By default, the indexing data is stored in the VBRCatalog folder on the backup server. Veeam Backup & Replication creates the folder on a volume with the maximum amount of free space, for example, C:\VBRCatalog.