This is a 500GB external hard drive from I-O Data. I've used it for 10 years, but I'm selling it because I bought an SSD. - Data has been erased using data deletion software. - Transfer speed is slow, but it's still usable. - Box and manual are not included. I will include the USB cable. Model number: HDH-U500SR2 Manufacturer's HP: https://www.iodata.jp/news/2007/10/hdh-usr2.htm Model number: HDH-U500SR2 - Connection type: USB - Size: Compact - Color: Silver/Black ● Drive rotation speed: 7,200 rpm ● External dimensions: 49.0(W) x 196.7(D) x 174.9(H)mm *excluding protrusions ● Compliance standards: VCCI Class A, RoHS compliant Thank you for looking.