Power off the desktop and unplug it
Open the case side panel
Locate an available 2.5-inch drive bay or mounting point
If needed, attach the SSD to a 2.5-inch-to-3.5-inch adapter bracket
Secure the SSD to the bracket or bay with screws
Connect a SATA data cable from the SSD to a motherboard SATA port
Connect a SATA power cable from the power supply to the SSD
If using an M.2 SSD instead, insert it into the M.2 slot at an angle
Press the M.2 SSD down and secure it with the mounting screw
Close the case side panel
Reconnect power and boot the desktop
Enter BIOS or UEFI to confirm the SSD is detected
Initialize, partition, and format the SSD in the operating system if needed