The Western Digital WD Red Pro 4TB 3.5" Internal NAS Hard Drive is a high-capacity hard drive designed specifically for use in network attached storage (NAS) systems. With a storage capacity of 4TB, it provides ample space for storing large amounts of data and files. The 3.5" form factor makes it compatible with standard NAS enclosures, while the WD Red Pro model ensures reliable performance and data integrity. This hard drive is ideal for use in NAS systems in homes, small offices, or small businesses that require a large storage capacity.

I used AI for this description so please look it up if you have any questions. I bought them new for my office because the IT guy said I needed them but I actually ended up not needing them. Never opened