I like to recommend installing the free demo version right before buying and check the necessity for session management. The OC Session Manager module is primarily intended for OpenCart three. Opencart stores some consumer data (language, currency, cart, etcetera.) in PHP classes. OpenCart can store this information in two approaches: https://encryptioncards27272.blogolize.com/the-definitive-guide-to-opencart-backup-and-restore-71070076