Clone boot disk from current SSD to M.2

1. Install disk
2. Check if found with

> dmesg | grep nvme0

[    1.156988] nvme nvme0: pci function 0000:02:00.0
[    1.372600] nvme nvme0: missing or invalid SUBNQN field.
[    1.372657] nvme nvme0: Shutdown timeout set to 8 seconds

3. Clone with ddrescue and save recovery file to third disk.
   /dev/sda is the current SSD disk.

> ddrescue -f -n /dev/sda /dev/nvme0 /media/bigblue/recovery.log

4. Mount new disk

> sudo mount /dev/nvme0n1 /mnt

Remove swap, resize and then add swap back

> gparted

5. Install grub on new disk

> sudo grub-install --boot-directory=/mnt/boot /dev/nvme0n1

6. Reboot

Both disks are now bootable.