The Media Creation Tool sucks and never completed the burning process.Here's a good guide to the issue: https://appuals.com/fix-media-creation-tool-error-0x80042405-0xa001a/
I'd recommend: 1. make sure your USB thumb drive is 8GB or larger. 2. Format the thumb drive per this guide (solution 2). 3. Follow the instructions in solution 1, i.e. download and run the installation media creation tool directly on the thumb drive.