Retention is the setting that decides whether a camera system was worth buying, and it is the one almost every quote leaves at whatever the recorder shipped with. That default is usually somewhere near fourteen days.
Fourteen days sounds reasonable until you count backwards from a real incident. A supplier disputes a delivery three weeks later. An employee raises something that happened last month. An insurer opens a claim and asks for the week either side of a date. By the time any of those requests arrive, the drive has already recorded over the footage with newer footage of nothing happening.
The three questions that set how many days you need
How long does your insurer expect footage to exist? Some policies say it outright. Many do not, and the number only surfaces during a claim, which is the worst possible time to learn it. It is worth asking your broker before you buy a system rather than after.
What does your industry require? For most Denver businesses this is a judgement call. For licensed cannabis operations it is not: Colorado sets retention directly, and a system that cannot meet it is a compliance problem rather than an inconvenience.
How long does it realistically take someone in your building to notice? This is the question people skip, and it is usually the one that moves the number most. Theft from a stockroom might surface in days. A pattern of small losses might take a month. Damage to a vehicle in a shared lot often surfaces whenever the owner next looks closely.
For most commercial properties in the metro, the honest answer lands somewhere between thirty and ninety days.
Storage is the cheapest part of a security camera system
It is also the last place worth economizing. Doubling retention rarely doubles the price of a project, because the cameras, the cabling and the labor do not change. Going back a year later to add capacity costs considerably more than specifying it correctly at the start.
Resolution and frame rate move the number of days
Retention is not set in isolation. A 4K camera recording continuously at full frame rate consumes storage far faster than the same camera configured sensibly, and on most positions the difference is invisible in playback. Deciding resolution, frame rate and retention together is what keeps all three honest. Deciding them one at a time is how a system ends up recording beautiful video of an empty yard for eleven days.
What to ask for on a footage retention quote
Ask for the retention period in days, at the resolution and frame rate the system will actually run at. A quote that lists cameras and a recorder without stating that number is not telling you the thing that matters most.
Retention is one of the few numbers worth settling before anyone quotes you. Elite Security sizes it on the walk-through. There is more like this in the blog, and when you want a quote rather than an explanation, start with commercial CCTV.