I do all as you said.

First I added lines in the fstab and then powered off box and putted HDD in the box. The start up process of system stopped in the beginning... something is not correct...

I took out HDD and powered on the box, all was OK again.

Can you please describe procedure step by step? I have expanded root on USB with ppanel which path is /media/hdd.

Now I need help to install Hard disk to have space for recordings only, not for system files.

Thanks again.