Restore osmc to its previous state from sd card

Hi everyone,

Ok, I have reinstalled osmc, the external hdd has been recognized and automounted without further instructions like fzinken mentioned.
I have installed the Aeon Nox skin. I am not being original here but gee, that’s beautiful.

I have reinstalled Deluge and it’s working too and I am nearly there:
I have created a file on my hdd called completed and so set up Deluge to download to media/Name of my hdd/completed. Instead, Deluge created a media/Name of my hdd/completed on the SD card where the downloads are sent.

Could anyone lead me to the right direction as to what the right path to the external hdd is?
Do I need to enter an ip address, like of my hdd/completed?

Thanks in advance for your help.