GRUB Can't find sda partition

I have dualboot on my laptop with windows being the primary OS. Today after my linux os froze I hard rebooted the laptop. After that I got a kernel panic. I've been trying to solve it using GRUB. I did: #first set root = (hd0,msdos3) #this is where my linux os is #second linux /boot/vmlinuz-4.13.0-45-generic root=/dev/ and at this point I don't see sda or any sdX folder which I can mount to root. Can it be in another folder or should I look somewhere else? I'm following these instrunctions that a friend of mine told me to follow. set root = (linux partition) linux /boot/vmlinuz... root=/dev/sda1 initrd /boot/initrd.img... boot