Which of the following is a common feature of modern storage facilities?

A common feature of modern storage facilities is the incorporation of integrated security features, such as video surveillance. This is vital in ensuring the safety and security of the stored items, as it helps deter theft and vandalism while providing peace of mind to tenants. The presence of video surveillance systems allows for real-time monitoring and can aid in investigations if any incidents occur.

In contrast, while on-site residential units for managers may be beneficial in some facilities, they are not universally implemented in all modern storage facilities. Unlimited access hours for all visitors can compromise security, as unrestricted access might lead to unauthorized individuals entering the facility. Lastly, the use of traditional wooden units is becoming less common in favor of more durable and weather-resistant materials, which are preferable for protecting stored items. Thus, integrated security features stand out as an essential characteristic of contemporary storage solutions.