The surveillance video of the cake shop can be saved for about half a month.

How long the surveillance video recorder can record depends on the size of the hard drive, the clarity of the surveillance camera, and the specific settings. Customers who need surveillance video generally require recording for more than half a month. Video files are stored in a circular manner. When the hard disk space is insufficient, the oldest file will be overwritten.

Video storage data reference:

720P: about 30G per channel per day, 960P: about 40G per channel per day, 1080P: about 50G per channel per day.