Thanks very much Dan - makes sense. Have now painted everything blue and will advise in next day how it goes.
And looking at previous recordings it’s now obvious that not all time was being recorded (ie there were gaps between recordings between each file). No wonder I was getting 5-6 weeks worth of recordings on my 3TB drive… looks like I’ll need to add a 2nd drive now we are actually recording continuous…
Dan - I can already see the above has fixed the problem… latest file is 8 mins and 44 MB in size and growing. Good given I made the change 8 mins ago.
Thanks again - much appreciated.