StarWind Virtual SAN does not provide any backup/restore capabilities of its own. Therefore it relies on existing 3rd party data protection solutions.
VMwares free-of-charge backup software that comes with any vSphere license, VMware vSphere Data Protection (VDP), has been declared End-of-Availability and is not supported for VMware vSphere 6.7 and up.
StarWind, Virtual SAN [SDS]/13279, x86
Backup Frequency, Points-in-Time, Data Availability