DIY NAS with SAS Drives

Hello,
I need some help.
I have 4 NAS Drives that I would like to use in a NAS. I ordered SATA but got SAS delivered. Dumb as I am I assumed that I got SATA drives and I just wasn’t able to install the drives in a used QNAP that I got from a friend.
Now I have two choices: DYI NAS with the SAS drives or buy 4 SATA. drives. The DYI sound more interesting. Therefore I need some help with the project. I have found the following hardware that I would use for my small NAS:

CPU: AMD Ryzen 5 3400G, 4C/8T, 3.70-4.20GHz
MOBO: ASRock B550 Phantom Gaming 4 - has 6 SATA ports and 4 RAM slots.
Cooler: Thermalright Peerless Assassin 120 SE
RAM: Klevv Cras X RGB UDIMM 16GB Kit, DDR4-3600, CL18-22-22-4
Case: AeroCool Cipher - Mesh and room for more drives.
PSU: Chieftec Chieftronic PowerUp GPX-550FC 550W ATX 2.53 - 80% Bronze.
SAS Controller: Broadcom SAS 9300-16i, PCIe 3.0 x8
SAS-Drives: Exos 4TB
OS-Drive: An old MX500 SATA SSD

My main questions are which OS and which cables do I need to connect the SAS-Drives? I have tried finding some guides on this but I am not sure if I have found the right ones, so I am asking real people.

I don’t want any top of the line parts since the NAS just have to storage some personal data and it is not getting hammered at any time. The parts just have to be good enough.

Anything else you need of information? I am happy to answer any quations you have to be able to give a good solution.

Thank you very much.

Double check the name of the ports, but you should be able to use a cable similar to these

https://www.ebay.com/itm/157034050761?_skw=SFF-8643+to+4+SAS+SFF-8482

It should have a mini-hd SAS connector on the HBA, and the SFF-8482 will allow each drive to be powered with regular sata power connectors.

This is presuming you don’t have a backplane/hotswap, and are looking to simply connect directly

Please be aware, SAS HBA cards, can have a square connector like that one, or one of two flatter ones.

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