Drive 12 on RS2416RP+ is damaged and in critical status. Back up your data immediately <https://kb.synology.com/DSM/tutorial/How_to_back_up_your_Synology_NAS> and then replace the drive. Drive information Brand: Seagate Model: ST4000DM000-1F2168 Capacity: 3.6 TB Serial number: Z301BTAQ Firmware: CC52 S.M.A.R.T. Status: Critical Drive reconnection count: 12 Drive re-identification count: 0 Sign in to store241-1 (if not already) for more information. From store241-1