High compatibilityConnect your SATA / IDE device to your computer as an additional external hard drive via USB 3.0. Compatible with 2.5"/3.5" IDE/SATA hard drives and DVD-ROM, CD-ROM, CD-RW, DVD-RW, DVD + RW Optical Drive. Compatible read up to three hard drives simultaneously. Intelligent BackupOne Touch Backup (OTB) Function. Design for people who need to backup data from your computer to portable hard drive. (Please install the included OTB Software CD. OTB function doesn't work for Mac OS and Linux)