We use Blink cameras in the office, and have outside and inside units.
I think, and I could be wrong, they only record when they sense movements and not continuously.. But that has never been a downside for us.
They are pretty cheap, and you can keep adding extra units to them
We’ve got a mix of the powered versions, and the completely stand-alone units, which use 2xAA batteries.
Seem to last around 3 months on a battery change which is decent.
And it costs £6.99 per month for the cloud storage, which again I really don’t think is too bad at all.
For the ease of setup, lack of cabelling, and just how easy it is to add another random camera purely by ordering it on Amazon.. I would recommend these every time!