About the Product: 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 Compatible with: 2.5"/9.5mm Sata HDD or SSD, hard drive not include. 100 percent brand new 9.5 mm-thick caddy Fully integrated into laptop, no cables/PSU/software driver needed. Fast and reliable connection in laptop, just as the primary HDD Make NTFS hard drive if you are using it as a new in disk Features & details 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 Replace your Laptop SATA CD / DVD drive with a second Hard Drive or Solid State Drive. Compatible with: 2.5"/9.5mm Sata HDD or SSD, hard drive not include. 9.5 mm-thick caddy Fully integrated into laptop, no cables/PSU/software driver needed. Fast and reliable connection in laptop, just as the primary HDD Make NTFS hard drive if you are using it as a new in disk management