These internal hard drives are compatible with laptops, PCs, and Macs, and have a 2.5 in form factor. The drives can support SATA III, SATA II, and SATA I interfaces based upon selection, and is a HDD-only storage format. These drive has a varying capacities ranging from 60GB - 1TB and either 5400 rpm or 7200 rpm based on selection. It is a good choice for those who need a reliable and high-capacity storage solution for their laptops or desktop computers. These drives are used but have been tested. If you tell us the file system format you would like, it can be ready to use in your device. We will format it free of charge.