Does it not save in five min chunks, (mine can do 1/3/5 min chunks, then as the storage runs out it records over the oldest chunk.
If you manually hit capture, or the motion/g detector is triggered it will save that chunk to a dedicated folder that won’t be recorded over automatically.
If your setting the camera up in the home, powered it off a USB phone charger, or a large power bank 15k mah should get you long stints.
Saying all that, you would be better off paying out a bit more (quite a bit) and buying a proper camera that streams the footage to an online server, then the landlord/trespasser, can’t just take the camera/sd card, well they could, but you’d still have the footage. This would be rather pricey, at about £100 for the camera, and a monthly sub for there integrated online backup.
Your pest bet would be to buy a raspberry pi set up a camera on it, £30 total, have it capture 1 frame a second or 3 (so photo slide show) and have it upload to your home PC, or even a Google drive. I’m sure there is an If this then that (Ifttt) script to do this very easily.
You can hide a pi in an old tea/coffee/sugar can. And run it off a 15k power bank for full stealthness. Failing that a phone charger is stealthy too.
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