Generally speaking, the size of HHDs in laptops is mainly 2.5 inches, but some ultraportable notebooks may use the 1.8-inch disk size. In this part, I mainly show you what tools you'll need for laptop SSD upgrade. As for desktops, upgrading to SSD may be very easy because they have more than one hard drive bays. Tip: In this post, I will mainly focus on how to upgrade laptop HDD to SSD.