What is a key disadvantage of using Network Attached Storage (NAS) for backup and restoration?

Using Network Attached Storage (NAS) for backup and restoration comes with several advantages, but a significant disadvantage is that it is typically located onsite. This creates a potential vulnerability because, while NAS provides a convenient way to store and access data over the network, it does not protect against all threats, particularly those that can affect physical locations, such as natural disasters, theft, or local hardware failures.

When data is only stored onsite, there is an increased risk of losing it if something catastrophic happens to the premises, such as a fire or flooding. Additionally, cyber threats, like ransomware attacks, can also compromise the data stored on a NAS device. Therefore, a key takeaway is that relying solely on onsite storage may leave data at risk if appropriate backup measures—like offsite storage or cloud solutions—aren't integrated into the overall data protection strategy.

The other options address various concerns that may not be predominant disadvantages of NAS. For instance, NAS can indeed be a cost-effective solution for many businesses and can support automated backups depending on the configuration, and while it does require power, this is common to most technological devices.