The RAID PRO uses a pair of 2.5in HDDs to offer RAID 0 for performance or RAID1 for added data protection. The latest edition to LaCie’s wide range of rugged external drives is the twin drive Rugged RAID PRO which uses a pair of 2.5in HDDs to offer RAID 0 for performance or RAID1 for added data protection. The drive also comes with a built-in UHS-II SD card reader.