What Is a “Surveillance” or “NAS” Hard Drive? Share April 29, 2020 Dm4r Technology Capacity isn’t the only thing that differentiates one hard drive from another. Yes, they’re all spinning platters that use magnetic storage to save data. However, some are marketed as “Surveillance” or “NAS” drives. Here’s how these are different. Read This Article on How-To Geek › Source : What Is a “Surveillance” or “NAS” Hard Drive?