Hi,
this won’t cover every last aspect of a backup/transfer to a new system. However, these are the things you can do with minimal effort while covering probably most of your settings:
Profiles are most effective, this will already be sufficient for many users. Very nice feature! Include the other two files that are mentioned in this tutorial and you have a very solid basis:
Saving Profiles & Co
Next, I would suggest to save the Preferences folder. “xy” is a placeholder for your Cubase version
C:\Users\Name\AppData\Roaming\Steinberg\Cubase xy_64
This one contains presets, templates, etc and it should be the first one on your save-list.
Apart from that there are numerous folders that contain additional presets, settings etc. Here’s a non-comprehensive list to pick from - depending on the things you want to save. The items behind each location are just examples:
C:\Users\Name\Documents\Steinberg
MIDI Remote
Strip Presets
FX Chain Presets
Drum Maps
Logical Editor
Project Logical Editor
C:\Users\Name\Documents\VST3-Presets
VST3-Presets (Steinberg plus 3rd party presets)
C:\Users\Name\Documents\VST XMLs
Generic Remote Editor
C:\Users\Name\AppData\Local\Steinberg\Steinberg Media Bay Server
Mediabay
C:\Users\Name\AppData\Roaming\Steinberg\Application Files\Cubase xy_64\Profiles
Surprise - Profiles in case you forgot to save them earlier before 
C:\Program Files\Common Files\Steinberg
Mediabay
C:\Program Files\Common Files\VST3
The actual VST3s which all reside in this folder
Hope that helps!