...
To take a full backup of your FreePBX 15+ system, use the Backup & Restore module. For detailed instructions on configuring and creating a full backup, please refer to the Using the Backup module for FreePBX 15+ wiki on Using the Backup Module.
How to Create a Backup from Legacy FreePBX (2.x/13/14)
To take a full backup of your FreePBX 2.x/13/14 system, use the Backup & Restore module. For detailed instructions on configuring and creating a full backup, please refer to the Using the Backup module wiki on Using the Backup Module.
...