Question Bios randomly asked me what drive to boot from

[BCEbear]

Hi All,

Hopefully this is the right location. So I just turned my computer on like I do daily. And a Bios dialog box popped up before the windows logo screen and asked me what drive to boot from. The options it gave me was my 250 Samsung Evo SSD (Where it always boots from) my HDD WD Black 1tb and my external WD 8th HDD. Obviously I picked my SSD as it is my normal drive anyway. It booted fine and the computer ran perfectly fine. Like im very confused on what could cause this or how to prevent this in the future

 

[RARRAF]

if it hapens more than once its probably the bios battery watch battery.

 

[BCEbear]

How does one fix that or is that a new mobo needed? Also how so soon just built it a year and a half ago its a b440 asus