System presented a storage not available and recordings lost. I presumed it was a hd fault and bought a recommended WD Purple 1 TB Surveillance Hard Disk Drive and fitted it without problem, still not recognised and HD seems not to be spinning, so not sure, had back off again and prodded about a bit to see if any loose connections but nothing obvious. rest if the system on the freesat/reception side seems fine so maybe I have wasted £42? Any thought please