untested - no box . The Western Digital WD4006FZBX 4TB HDD is a high-performance internal hard disk drive designed for computers and networking devices. With a storage capacity of 4TB and a SATA III interface, it offers fast data transfer speeds and ample storage space for various files and applications. The sleek black color and reliable brand reputation make it a popular choice for those looking to upgrade their storage capabilities. Made in Thailand, this HDD combines quality craftsmanship with cutting-edge technology for efficient and reliable performance.