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This means data storage is not redundant – a hard
disk failure or theft of the NVR would mean that you lose all your recorded footage. USB backup is supported on most NVRs to mitigate against this risk but ideally the NVR should have at least 2 hard disk bays and automatically write a copy of the footage to the second hard drive. The other option to explore is whether the NVR can write the footage to a remote network location such as a NAS. To learn more about surveillance hard drives, check my latest guide. Best 4 channel
NVR KitsBest Budget 4 ch NVR Kit: Amcrest 1080p 4 channel NVR Kit with 4 1080p PoE cameras and 1TB hard drive Amcrest NV2104E IP2M 852EB4 NVR Features4 channel recording @ 1080p supportedPoE enabled1TB hard drive included, max. possible is a single 6TB hard driveMotion detection with email alerts and push notificationRemote smartphone accessONVIF support allows you to connect 3rd party camerasIP Camera Features IP2M 842EB3 axis black colour camera2MP CMOS image sensor 1080pNight vision with 30m IR range, true IR cut filterRJ45 PoE portsIP 67 Weather ratedRead Amazon user reviews Amcrest is already on our recommended outdoor and indoor IP camera lists.