Mike has a Swan surveillance camera with a hard drive recording option that archives for seven days before it loops around. He'd like to expand that to a month. Can he? Leo says he might be able to with a larger hard drive, but it may be specially locked down to prevent upgrading or hacking it to his liking. It largely depends on the DVR.
Dr. Mom says that Swan encourages attaching an external SATA drive to a DVR for that purpose. Check out this page at support.swann.com. Or he can install a larger hard drive.