Things to know
the USB drive needs to be formatted as exfat, or fat 32, and MBR
The file you downloaded, would uncompress as 3 file names, and one folder with the files inside , copy the 3 files and the folder to your flash drive
It is best to only have them on the USB flash drive, it might complicate things (maybe not but best practice
Is 20204 the version it said it was going to updated it to? What were you expecting it to update to? (no it will NOT be 3.4)