Thank you for viewing. Capacity: 320GB, USB external HDD. Bus-powered type, no AC adapter required. The hard disk's health status has been confirmed as normal with CrystalDiskInfo. *Formatted using dedicated software (CrystalDiskInfo) on my computer (Windows 10)* Supported OS: Windows 98/SE/ME/2000/XP/Vista32/64 Win7/Win8/Win10 /Mac OS 8.6 and later Ideally used as an external drive for a computer, but also ideal for TV recording and Blu-ray recording. ★★Please check the following notes if using for TV recording★★ If your TV has a recording function ("External USB HDD" recording function), you can record TV programs by connecting a compatible USB external HDD for PCs. Formatting from the TV side is required when connected to the TV. *Please refer to your TV's manual.* Due to compatibility issues with cables, cases, or the HDD itself, it may not be compatible with certain TVs and may not connect. 【Product Contents】 ・The case is a new, unused item. ・The internal HDD is a used HDD. ・Ready to use immediately, no drivers needed. ・Adopts USB 3.0 communication protocol, also compatible with USB 2.0/1.1. ・Supports various USB peripheral devices such as computers, smart TVs, and PS4. 【Accessories】 HDD main unit, HDD case (assembled) USB 3.0 cable x 1 Other capacity HDDs are also on sale, please take a look if you are interested. ♯External hard disk ♯HDD ♯hdd ♯Hard disk ♯External hdd ♯Expansion storage ♯Backup ♯TV recording ♯Dubbing ♯PS4 ♯USB3.0 ♯HDD320GB ♯HDD500GB ♯HDD640GB ♯HDD750GB ♯HDD1000GB ♯External portable hard disk ♯USB3.0 cable