Help switching consoles

[popodom]

Hello everyone,

I'm in a bit of a tricky situation and could use some expert advice.

Here's my setup:

1. Old Wii U:
   • Modified with Aroma
   • HDMI output not working properly, but still usable via the gamepad
   • Has all my accounts, saves, settings, etc.
2. New Wii U:
   • Modified with Tiramisu
   • Fully functional

My goal is to transfer as much data as possible from the old Wii U to the new one, ideally without losing any information. This includes accounts, save files, settings, and anything else that can be preserved.
I'm looking for a step-by-step guide on how to achieve this transfer between two modified consoles (Aroma to Tiramisu). What's the best approach to ensure I lose minimal, if any, data?

Additionally, I have an external hard drive with games installed on the old Wii U. Will I need to reinstall all these games on the new console, or is there a way to reuse the hard drive as-is?
One more question: Should I remove the mods from both consoles before attempting the transfer, or should I align both consoles to either Aroma or Tiramisu? What's the safest approach?

Any help or guidance would be greatly appreciated.

Thanks in advance!