QNAP TS-439U-RP/ SP is the new generation 1U rackmount model of the worldwide award-winning Turbo NAS Series, providing superior performance for massive data sharing, powerful all-in-one business server features, advanced RAID data protection, built-in iSCSI target service, AES 256-bit volume-based encryption, and rock-solid hot-swappable hard drive design for business. The newly-designed HDD tray for 2.5-inch and 3.5-inch HDD dual support is also equipped in TS-439U series, which gives users more choices to deploy the hard drives.