RAID, an array stores data over multiple HDDs to provide enough redundancy so that data can be recovered if one disk fails. If the video recorder supports RAID, when enable the RAID function, and ensure each HDD capacity is not less than 4 TB.
Two ways are available for creating an array:
one-touch configuration and manual configuration.
It’s better to create RAID via One-touch Configuration, RAID 5 will be created by default.