Moving root partition to SSD on dualboot system

Question

I just installed an SSD next to an already existing HDD on my laptop. It is a dualboot system with Windows 10 and Ubuntu 18.04. I already cloned the Windows and boot partitions to the SSD with success, so when the laptop starts it directly goes to GRUB on the SSD with the options to start Ubuntu or start Windows 10 through a chainloader (because of EFI). The Ubuntu install itself is still on the HDD, but with a seperate root and home partition. Both operating systems work.

Now, what I want to do to boot faster into Ubuntu is to move the root partition to the SSD. I don't want to reinstall Ubuntu. What's the best way to go about this?

Answer 1

The cleanest way is to reinstall on SSD. Create 2 partitions on SSD, one for / and other /home, boot new version, reinstall the apps, then copy all user's content from old HDD into SSD's /home/ folder.