If everything works ok then you do not need it.
Your BIOS must have the RAID function enabled and that is why it shows in Device Manager. If you wanted to you could install the drivers for it from your Motherboard CD.
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.