If you are familiar with the DR appliance which QoreStor is based on it supports the following major features.
Enterprise Class Dedupe and Compression - An average savings of 93% on typical backup workloads
Managed Replication - Ability to allow the backup application to replicate individual jobs.
Encryption at Rest - Ensures data is fully encrypted on disk
Secure Connect - Enables Encryption in flight and auto reconnect over the WAN
Source Side Dedupe - Reduces network traffic and can significantly speed up backups the more clients you have.
Direct to Target - Allows data to go directly QoreStor vs passing through a media server reducing points of contention in the data path
Storage Groups - Allows MSP and controlled environments to segment data and track actual usage.
OST Protocol Support - Netbackup and Backup Exec Support
RDA Protocol Support - QoreStor version 4.1 supports RDA version 4.0.3 and later which allows for NV and vRanger Support.