LaCie 4big/5big Spare Drive - hard drive - 4 TB - SATA 3Gb/s

Lacie offers spare disks as a convenient option to further protect your data. Because they are hot-swappable, you can immediately replace your failed disk in case of a problem and a secured RAID mode will automatically rebuild, without any downtime in your workflow. A spare drive and drawer are designed for use with the LaCie 4big Quadra.