Question PC boots up windows but will occasionally boot up bios

Jul 17, 2024
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Hello I need help with my PC
My motherboard is gigabyte a520m k v2

Whenever I turn my PC on it will sometimes boot into Windows and other times it boots into bios and it shows that there's no boot device found and when I go to the M.2 area it shows "M.2 :N/A
I'm not sure if it's my SSD or my motherboard please help thank you