<ul><li>Compatible Channels switch help to improve the compatibility.You can try to move Left or Right if your Laptop can not read HDD. First Try with default position</li><li>Compatible with: Sata HDD or SSD, hard drive not include. 9.5 mm-thick caddy</li><li>Replace your Laptop SATA CD / DVD drive with a second Hard Drive or Solid State Drive.</li><li>Fully integrated into laptop, no cables/PSU/software driver needed. Fast and reliable connection in laptop, just as the primary HDD</li><li>Compatible Channels switch help to improve the compatibility.You can try to move Left or Right if your Laptop can not read HDD.</li></ul>