The Seagate IronWolf Pro 16TB is a 3.5-inch hard drive for use in a commercial NAS or a server. This IronWolf Pro drive has a higher workload than the regular IronWolf drives, since you can process up to 300TB worth of files per year. In addition, you'll receive 2 free years of Seagate Rescue Data Recovery. This means Seagate will restore your files in case of damage, giving you more security that your data remains stored. The files you often use can be quickly opened, thanks to the large 256MB cache memory. And thanks to the IronWold Health Management software, you can closely monitor the temperature and condition of your drive. Want to save power? The drive will automatically switch to energy-saving mode.