This product is a caddy case designed to add additional storage to a laptop by replacing the CD/DVD-ROM optical drive with a solid-state drive (SSD). Here are the key features and specifications: 1. Compatibility: Compatible with laptops that have a 9.5mm universal CD/DVD-ROM optical bay. 2. SSD Compatibility: Works with MSATA or NGFF (Next Generation Form Factor) B/M-key SSDs. Note that MSATA and NGFF SSDs cannot work simultaneously, and you need to use the switch to convert between them. The adapter only works for B-key or B/M-key socket NGFF SSDs, not M-key socket. 3. Installation: Fully integrated into the laptop, no additional cables, power supply, or software drivers are needed for installation. Simply remove the CD/DVD-ROM drive and replace it with the caddy containing the additional hard drive. 4. Dual Boot: Supports the installation of a second operating system on the additional hard drive, allowing for dual-boot functionality and boot selection. 5. Installation Steps: Unpack