The item in the image is a 2nd HDD/SSD caddy, designed to add a second hard drive or SSD to a laptop by replacing the optical drive (CD/DVD-ROM).
Helpful information:
It connects via SATA interface.
Allows for increased storage capacity.
Supports 2.5-inch HDDs or SSDs.
Easy to install, no drivers needed.
Common sizes are 9.5mm and 12.7mm, ensure compatibility with the laptop's optical bay.
Some models support dual boot.
It is fully integrated into laptop, no cables/PSU/software driver needed.