Hi, We do not know how far you are till you reach all the steps in your map however you it looks like you do need RAID.  Please know HBA330 Controller, 12Gbps Adapter does NOT do RAID. H330 can. Hope this helps 
PERC H330 vs HBA330 Controller vs no raid for small medical office server ?   Need server upgrade for very small medical office (current server is gen4 i3, 8gb and 1tb 7200 HHD in a consumer HP desktop, bottleneck is occasionally HHD and rare occasion RAM) T140, server 2019 essentials (no roaming profiles because ),  running patient management software with ~35gb  sql database or     Planned data map Level 1, Workstations (four) with local profiles (Inexperienced with roaming profiles and don't want to create security hole, may upgrade to roaming profiles later date) Level 2, WinServer, patient management system, AND its data. BitLocker encrypted via WIndowsServer. Level 3, NAS- Gets routine full drive backups from the WinServer. Daily Level 3.5, A second volume on the NAS, accessible ONLY from the NAS OS. Permission restricted, duplicates backup of DATA Level 4.0 Daily cloud backup of DATA to HIPAA compliant cloud drive  
PERC H330 vs HBA330 Controller vs no raid for small medical office server