Today, upgrading a laptop's disk drive is such a lot simpler. Most laptops today are often upgraded as a DIY project. Most laptops have its disk drive s during a disk drive carrier (also referred to as a notebook disk drive caddy or notebook hard drive tray/bracket).

With the disk drive inside a tough drive caddy, users can easily remove or re-insert the disk drive into the notebook. Each notebook model features a different sort of caddy. Some drive caddies are as simple a plastic bezel that attaches to the front of the drive. Some caddies are more involved including a metal bracket (or enclosure), plastic bezel, drive connector (sometimes called interposer), cable and screws.

Most laptops have one disk drive bay and one optical drive bay. There are some laptops that have two internal disk drive bays and an optical drive bay. Laptops with two internal disk drive bays would have a caddy for its primary/main disk drive and would require another caddy to mount the a second disk drive or solid state drive in its 2nd disk drive bay.

For laptops with one disk drive bay and one optical drive bay, you'll still add a 2nd disk drive internally within the laptop. this is often done by replacing the optical drive with the 2nd disk drive (using a drive caddy specifically made to suit the optical drive bay). 

This universal caddy is best for HP, Dell, Lenovo, Acer, Asus, Sony, Samsung, MSI laptops. This is 9.5 mm Univarsal caddy which can be used in most of the laptops for adding second HDD or SSD externally.

9.5MM Universal SATA to SATA 2nd SSD HDD Drive Caddy Tray Enclosure for HP DELL Lenovo ACER Gateway ASUS Sony Samsung MSI Laptop

Features of this caddy -

• Compatible 4 Channels switch help to improve the compatibility.You can try to move " A""B""C""D" if your Laptop can not read HDD.

• Compatible with: 2.5"/9.5mm SATA HDD or SSD, Hard drive NOT include.100% Brand New 9.5 mm-thick caddy

• Fully integrated into laptop, no cables/PSU/software driver need.Fast & Reliable connection in laptop, just as the primary HDD Make NTFS hard drive if you are using it as a New in Disk management

• Package Content: 1x 2nd HDD Caddy, 4x Hard Drive Screws and 1pcs screw driver

• Supports 99% Laptops with 9.5mm size DVD Writers.