A document management and mobile access system synchronises digital documents across multiple sites for sharing among company employees. Local data is backed up and stored in the storage system, enabling disaster recovery, archiving and rapid access as needed. Additionally, data access can be optimised for each remote site with a central point of management. The system enables scanning, storage, retrieval, sharing, tracking, revision and distribution of documents. It reduces the need for manual handling of documents. For cloud-based solutions, data should be encrypted end-to-end.