If you are wondering how to format the HDD on the new T8-S Plus box from DroidBOX, well it is pretty much the same as in T8-S. But to be clear on how exactly to do so please go through the blog post below:
https://droidbox.co.uk/how-to/t8-s-plus-formatting-an-internal-hard-drive/
https://droidbox.co.uk/how-to/t8-s-plus-formatting-an-internal-hard-drive/