Installing the software is generally straightforward, but because it is older, there are specific steps to follow:

An easy-to-use "graphical" version of Clonezilla that runs from a USB stick.

The search for software keys like is a common path for users looking to restore or back up their systems using older HDD/SSD cloning tools. PCClone Ex Lite is often bundled with external hard drive enclosures or SATA-to-USB adapters.

Are you trying to to a new drive, or just back up specific files from your external enclosure?

While served its purpose for older USB 2.0 drives, the difficulty of managing serial keys and compatibility issues with modern Windows versions makes it a "last resort." If your goal is a safe, successful data migration, using a modern utility is your best bet.

If you cannot find your serial key, don't worry. PCClone Ex Lite is quite dated, and modern free alternatives are often faster, more reliable, and support newer file systems (like NVMe SSDs).