This Seagate 2.5 inch internal hard disk drive with a storage capacity of 4TB is a reliable and tested option for data storage. The model number is ST4000LM024 and the unit quantity is 1. It is a Rev Drive type and the brand is Seagate, with the P/N being 2AN17V-566 0001 and S/N WFG1A1WN. This hard drive is perfect for those who need ample space for data storage and is compatible with most computers and devices. This drive is approximately 1/2 in width. See photo's of exact drive.