This is a set of a 3TB HDD (LHD-WD30EURX) for recording from Logicool. The LHD-WD30EURX is an AV-oriented HDD with characteristics suitable for AV applications such as recorders, unlike regular PC HDDs. *Note: External HDDs sold at low prices do not always include this type of "AV-oriented HDD." (Quoted from the product description on Kakaku.com) ・3TB SATA3.0 connection 3.5-inch HDD. It has up to 40% power-saving effect compared to 7200RPM HDDs. ・Supports streaming in always-on digital audio/video environments such as PVR, DVR, and IPTV. It can withstand high temperatures. ・Optimized to smoothly and continuously play digital video, with up to 16 HD streams simultaneously. Please refer to the WD and Logicool websites for detailed specifications. Thank you for your consideration. *Note: The invoice is shown in the photo, but it contains personal information, so it will be removed before shipping the product. *The products were all purchased directly from the official Logicool online store and are unopened and unused, in the same packaging as when they were shipped.