Raid 10 Disk Disconnected

I set up a Raid 10 for the first time with 4 500gb disks. I am new and still learning about RAIDS. It has been about a month, when I notice a critical warning during a Windows 10 update boot up. I checked the RAID and notice that one of the disk is disconnected or failed. I checked the the disk health is at 100% and no bad sectors.

I am currently running the RAID 10 on 3 disk and the 4th disk is labels as single disk on the RAID configuration. How can I add that disk back unto the RAID? The disk shows as unallocated and separate from the RAID. I am afraid that I may make a mistake adding the drive and delete all my data. I just want some guidance on how to fix this.

My system set up is
ASUS M5A97 R2.0 / FX6300 / Kingston HyperX Fury DDR3-1866 2X4GB / Hyper 212 EVO

Here are some pictures:

I got it fixed. There is a software called RAIDXpert from AMD. This software allowed me to manage my raid though the browser and I was able to press "Rebuild" on the Single Drive. Everything is working now. The rebuild option was not available on the BIOS.