Windows 10: Installed a new motherboard. No bootable drive found

Hello, I installed a new motherboard because my last one was getting out of date. I have 2 storage devices. One is a normal HDD which is showing up in bios. The other is a m.2 SSD and that is showing up in bios as well. The only thing that is not showing up is my bootable device which is another m.2 SSD. I know it's compatible but anything i try on the internet does not work. Motherboard is ROG STRIX Z790-A Gaming WIFI II

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third sata drive not bootable ?

Exactly. On the where do you want to install Windows screen, it has the list of all 3 drives, but when I choose the new drive is when it says it cannot install because the drive is not a bootable drive. If I select one of the other drives with XP installed it doesn't give that message.

 

Ipod bootable drive?

I want to know if I can make my ipod a usb bootable drive.. will it mess up my ipod? I need to flash my video card back to normal.. Neros bootable cd gave me an error. I used a step by step guide, but thats another story.

 

Multi-bootable USB

Hey guys from TPU, couldn't find any specific thread pertaining to the question asked on title. As mentioned, I'm trying to create a bootable USB, but with many specifics boots available.

I've been trying to create one with multiple boot device including one that enables me to run Windows 10 directly on the USB Thumb Drive but to no avail.

The list of bootable images i'm trying to create are

1. Windows 10 (A full OS running from thumb drive)
2. Windows 10 ISO (Bootable disk image for fresh install)
3. MemTest86+

Have tried YUMI or UUI from the website USB PenDrive Linux but as this is my first time, i don't know how am i screwing up or am doing it right.. Anyone got a rough idea on a step by step guide? Thanks!