When I've upgraded in the past its just been added to what I had left on my subscription, so 72 + 365 days.
My subscription is due for renewal in 72 days would this just add on to my current subscription or does it start from when you activate it?
Actually there is no big differences ,you can use both of them . I have discovered this offer on upucuza.com and shared it here . Mainly free version of bitdefender total security is finished and campaign on internet security as free will be completed next weeks .
The Bitdefender Internet security 2019 is free for 6 months here. (Think it's 3 devices too.) https://www.bitdefender.com/media/html/consumer/new/get-internet-security2019-opt/ Not sure how much difference there is between this and Total Security.