You're buying a gently used 512 GB Thunderbolt Drive+. It's been used less than 12 times. You'll be amazed at how fast you're able to move files from your Mac (or PC) to the Drive+. Feel free to ask my any questions. I'm selling it as I need a larger drive. My loss, your gain. $500 shipped to the Lower 48 OBO. Elsewhere we'll split shipping. Lightning-fast Elgato Thunderbolt Drive+ utilizes a Solid State Drive (SSD) to store your data, dramatically outperforming other portable drives. With transfer speeds up to 420 MB/s, it's a worthy companion for your MacBook Air, MacBook Pro or Ultrabook with built-in flash storage. Truly Portable While you're on the go, less is more. That's why Elgato Thunderbolt Drive+ is engineered to draw power directly from a single Thunderbolt or USB port, without needing a separate power supply. This way, your data is always there with you, even when you're not near a power source. Versatile Elgato Thunderbolt Drive+ features both the most advanced and the most common connectivity standards to make sure you can always access your files. With Thunderbolt technology, you're all set for the future of high performance interfaces. Meanwhile, the backward compatible USB 3.0 port ensures that you can connect Elgato Thunderbolt Drive+ to virtually any computer that you need. No matter whether it's a Mac or a PC running Windows. Reliable Due to the lack of moving, mechanical parts, Solid State Drives are far less prone to accidental damage than traditional hard drives. But Elgato Thunderbolt Drive+ doesn't just use any SSD: with Plextor True Speed technology, server-grade controller chips guarantee sustained high performance, while high quality flash chips and custom firmware provide the lowest average annualized failure rate (AFR) in the industry.