Easy way is to download a program called RUFUS it's a utility that helps format and create bootable USB flash drives. Open it up & in the top right you will see a box what says. (#1) SELECT Click on the arrow pointing down next to SELECT & choose the DOWNLOAD Option & then click the (#2) DOWNLOAD Button what you have just selected. A new box will open up select (#3) Windows 10 if not already selected & press Continue & their you go. A new tab has appeared Called (#4) Release click on that & there are all Win10 versions to choose from. Select 19H2 (Build 18363.418 - 2019.11) that's the final 1909 press Continue a new tab will appear (#5) Edition just select Home/Pro or Education & press Continue new tab again select your (#6) Language last new tab will appear select (#7) x64bit or x86bit. (#8) DONT tick the Download using a browser box leave it empty then just click the (#9) DOWNLOAD Button & save the ISO were you like