Ubuntu – GRUB can’t find root files Ubuntu 20.04

20.04bootgrub2live-usbpartitioning

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-5.4.0.29-generic
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