Buffalo DriveStation Quad 4-Drive Desktop DAS 8 TB Total array capacity: 8 TB Interface: USB 3.0 Installed devices/ modules Qty: 4 (installed)/ 4 (max) High Performance NAS Edition hard drives offer continuous 24/7/365 operation with enhanced RAID performance Usb 3.0 offers universal connectivity for PC and Mac computers and storage servers Multiple levels of RAID support and hot-swappable hard drives provide comprehensive data protection Ideal for creative professionals, small office users, server backup and consumers High performance NAS edition hard drives offer continuous 24/7/365 operation with enhanced RAID performance USB 3.0 offers universal connectivity for PC and Mac computers and storage servers Multiple levels of RAID support and hot-swappable hard drives provide comprehensive data protection Ideal for creative professionals, small office users, server backup and consumers