Sometimes it happened, try again after few time probably it will work smoothly.

https://forum.recalbox.com/topic/15159/tutoriel-fr-en-installer-le-script-safe-shutdown-pour-nespi-case-et-superpi-case

https://forum.recalbox.com/search?term=Nespi case&in=titlesposts&sortBy=relevance&sortDirection=desc&showAs=posts

The xu4 kernel won't happen before months. I started working on it, there are too many changes involved regarding emulators and kodi

@alcartur ok, i.ve been searching a little more, it's gonna be much more complex than just adding a device id in an existing driver (which is what i had hoped so far ...)

Root has a percentage of free space reserved.

Login as root via ssh
Password is recalboxroot

Run df -h
If it shows the size for "Available" as being "0" and "Use" as 100%, but "Used" is < "Size"...

Run dumpe2fs /dev/mmcblk0p3 | grep -i reserved
This will prove the space is reserved.

Now that space was reserved for the root user so to reclaim that space, run
tune2fs -m 0 /dev/mmcblk0p3

Now the root user can run out of space and there are some possible problematic issues that could occur, but you can use your full capacity.

Warning: This should only be performed by power users who are not afraid of the command line and understand the commands they are running.

@Maxime-Allard-Valade thanks for your help!!

@paradadf
Hello, thanks for your information.
The machine is basically a stand up arcade machine. Which has been built from scratch using a timber frame construction, 19" ASUS LCD screen, joy sticks, Raspberry Pi3, speakers etc. The Recalbox software was pre-installed onto a SD card and had a few thousand games uploaded. To be honest I wasn't aware of it being illegal to sell something with Recalbox on it. The person was a private seller and built it for himself but no longer used it hence the sale, I do apologise if I've caused any issues by purchasing it.. I'm just intending on using it for personal use and as for the seller he was a random person on Gumtree here in Australia and he delivered it to me which from what I can see it is the only one he sold and doesn't have any more as I just did a search and couldn't find any.

I'll send a mail to the owner, like i did for the owner of mini emu...