The Seagate ST1000LM035 SATA 2.5" 1TB Mobile HDD is an internal laptop drive designed for use with laptops and PCs. This hard drive, with a storage capacity of 1TB, is part of Seagate's Mobile product line, making it suitable for portable storage needs. The drive is tested and verified to ensure reliable performance, making it a trustworthy choice for expanding storage capacity in your computer systems. With a SATA interface, this hard drive offers efficient data access and transfer speeds, making it a practical choice for various storage requirements.