Ubuntu – GRUB can’t find root files Ubuntu 20.04


Just tried to clean install my computer with the newest Ubuntu but it takes me immediately to grub. My partition is saved at (hd0,msdos5) it seams. I did the assignments as follows:

grub> set root=(hd0,5)
grub> linux /boot/vmlinuz-5.4.0-29-generic root=/dev/sda5
grub> initrd /boot/initrd.img-
grub> boot

But after boot I get the message that it gave up waiting for rootfile system device. And then an ALERT! /dev/sda5 does not exist. Dropint to a shell! and then I'm stuck ash, I think.

Really not sure what to do here since I've never had this kind of issue before