NEVER BEEN USED OUT OF BOX. The Seagate Mobile 1TB 2.5in SATA Laptop HDD ST1000LM035 is a high-capacity internal laptop drive with a rotation speed of 5400 RPM and a cache size of 128MB. It offers a storage capacity of 1TB and a read speed of 140MB/s, making it ideal for storing large amounts of data and accessing it quickly. The drive is compatible with laptops and is designed with a temperature sensor for added reliability. With a warranty of 2 years, this Seagate hard drive is a dependable choice for expanding storage capacity on laptops.