System Backup for multi-drive PC using Acronis True Image 2017

Hi,
Am I missing something?
I have a Dell T7910 Workstation in which I have installed four hard drives. Windows 10 Professional is installed on a 500 GB SSD drive. I want to perform a system backup that backs up only this SSD drive.
Acronis 2017 only seems to offer me the options of:
1) backing up my entire PC if I want to back up my O/S. This would amount to about 9.5 TB on four drives.
2) backing up particular partitions, folders and files on particular hard drives. I could be wrong, but I do not think this would give me a system backup that I could restore if I lost my O/S through the failure of my SSD system drive.
I would be grateful to any forum members who could advise me how I can use Acronis True Image 2017 to make a system backup without having to backup my entire PC of four hard drives.
My sincere thanks in advance.
Acronis Links : Acronis Scheduler Manager : Acronis VSS Doctor : Backup Archive Compatibility : Cleanup Tool (All versions) : Cloning Disks : Contact Acronis Support : Difference between Backup and Disk Clone : Repair program / settings
MVP Assistant (Log Viewer) latest version see pinned topic in ACPHO forum page.
MVP Custom PE Builder available from Community Tools page.
Acronis True Image User Guides available from Product Documentation page.
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