i would like to see the implementation to use external usb disk or second hard disk to use it as HAOS is beginning to be a pro SO
in my case i use a nuc and the second ssd can be used only with a modified repository of samba.
Don’t forget to vote for your own FR. 
Hello thcuba,
One of the first rules is to search if your request is a duplicate.
Perhaps check these out to see if what you ask is already covered and vote there.