If you have manually installed nvidia or realtek audio drivers (with several inf files) for every inf file windows creates a subfolder with all files within.
e.g. if you have 40 inf files in a generalised 100mb driver... it's about 4gb and you only usw 1 inf file.
check which driver (inf) is really needed/in use uninstall the rest with dism or pnputil (-f -d oemX.inf)