If you want 24/7 video recording or if you have multiple IP cameras to manage, this Reolink NVR is your best choice Pre-installed 2TB HDD for 24/7 recording and monitoring Support all cameras recording at the same time (up to 8 cameras) If you want longer recording, try motion detection recording, which will trigger recording only when motion is detected Allow you to install an external hard disk drive via e-SATA for more storage (up to 4TB) This NVR is recommended for use with Reolink POE Series IP Cameras We cannot guarantee that it will work with any other camera brands and we cannot accept any returns in that case