Yes, all CCTV systems are tailored to meet your exact requirements. We use the very latest recording devices that use h.265, a new compression which will give you long recording for less memory.
Most domestic installations will opt for 2 weeks continuous recording, so they are covered if they are away on holiday.
Commercial CCTV installs can vary, but it is indeed possible to put as much memory in the system as needed. For example, restaurants and pubs with the licensing laws, have to record for a minimum of 31 days.
Your new CCTV system will last you for the next 20 years, so our advice is to ensure you’re not short on memory/storage capacity and that your system is recording the highest possible video quality.