This is a compact external hard drive made by I-O DATA, which connects via USB 2.0. - Brand: I-O DATA - Type: External Hard Drive - Connectivity: USB - Color: Silver - Size: 250GB Thank you for looking. I have formatted, checked for errors, and confirmed data transfer on Windows 10. (Please note that this is an older item, as it has been some time since its manufacture.) Also, while the exterior doesn't have any major scratches, it does show signs of use, so please be aware of this.