Ensure the PC is completely powered off and unplug all cables to prevent electrical shock.
Remove the side panel of the PC case using a Phillips screwdriver to access internal components.
Wear an anti-static wrist strap and attach it to a grounded surface to prevent static damage.
Locate the existing hard drive inside the case, usually mounted in a drive bay or bracket.
Carefully disconnect the SATA data cable and SATA power cable from the old hard drive.
Unscrew and remove the old hard drive from its mounting bracket or bay.
Insert the new hard drive into the same mounting bracket or bay, ensuring it is secure.
Reconnect the SATA data cable and SATA power cable to the new hard drive, ensuring firm connections.
Replace the side panel of the case and secure it with screws, then reconnect all external cables.
Power on the PC and press the key to enter BIOS/UEFI setup (often F2, DEL, or ESC).
Verify that the new hard drive is detected in BIOS; if not, recheck connections.
Boot into your operating system or install a fresh OS on the new drive if needed.
If cloning the old drive, use cloning software to transfer data before replacing the drive.