[SOLVED] Why can't I choose my M.2 SSD as my boot device?

Oct 15, 2019
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Hello. I just booted my newly built computer for the first time and got the "Reboot and Select proper Boot device" message. I tried going in the BIOS to select my M.2 SSD Card as the first priority, and noticed that it had a red outline. It was the only device that had a red outline. This is my only storage drive, so I'm wondering how to fix it.
Here's a picture to show what I mean
View: https://imgur.com/a/L4Z8GmW



Here's the spec list:
Mobo: B450 Tomahawk Max
CPU: Amd Ryzen 5 3600
GPU: MSI GeForce RTX 2060 Gaming Z
RAM: 2x Corsair Vengeance RGB Pro DDR4 16GB
Storage: Crucial MX500 1TB M.2 SSD
PSU: Corsair TX550M, 550W