I'm not aware of an SF8008 with internal hdd. Do you have a link?
I copied info from elseware so it is dated Dec 20th 2020 the post was by Octagon.
OCTAGON SF8008 jetzt auch mit intern eingebauter Festplatte.
OCTAGON SF8008 now also with an internal hard disk.
AMAZON
amazon.de
EBAY
ebay.de
OCTAGON SF8008 Single + 1TB HDD - EAN 4260189996570 194,90 euro
OCTAGON SF8008 Single + 2TB HDD - EAN 4260189996587 224,90 euro
OCTAGON SF8008 Combo + 1TB HDD - EAN 4260189996594 204,90 euro
OCTAGON SF8008 Combo + 2TB HDD - EAN 4260189996600 234,90 euro
OCTAGON SF8008 Twin + 1TB HDD - EAN 4260189996617 214,90 euro
OCTAGON SF8008 Twin + 2TB HDD - EAN 4260189996624 244,90 euro
OCTAGON SF8008 Single + 1TB HDD + WLAN - EAN 4260189996631 199,90 euro
OCTAGON SF8008 Single + 2TB HDD + WLAN - EAN 4260189996648 229,90 euro
OCTAGON SF8008 Gold Combo + 1TB HDD - EAN 4260189996938 209,90 euro
OCTAGON SF8008 Gold Combo + 2TB HDD - EAN 4260189996945 239,90 euro