HTML does not find local links and local images (Chrome on Android 10)

I am using a tablet (Lenovo M10 FHD Plus) which works under Android 10. According to https://android.stackexchange.com/questions/220400/local-files-revisited-opening-local-html-files-file-path-to-file-in-chrome , in order to use local URLs in HTML, I put my documents in the folder: Files > Internal Storage > Android > data > com.android.chrome > files > Download Inside my "index.html" file I use: ...href="a1.html"... ...src="smily.gif"... The HTML files "index.html" and "a1.html" as well as the image "smily.gif" are located in my tablet inside the above-mentioned folder. When I click on the file "index.html" and select Chrome, the file is correctly opened by Chrome... but the "smily.gif" image is not displayed (I get instead the alt="This is a smily" text). Furthermore, when I click there on the link (local URL) to open the document "a1.html" Chrome does NOT find it, and displays instead an empty page with the following error message: > Your file couldn't be accessed > It may have been moved, edited, or deleted. > ERR_FILE_NOT_FOUND Needless to say, the above HTML samples work perfectly on my Windows 10 computer (including local links and images)! My questions are: 1) Where should I put my files "index.html", "a1.html" and "smily.gif" (if the above-mentioned folder is wrong)? 2) If href="a1.html" and src="smily.gif" does not work in Android, how should I refer to local files in href= and src=? 3) Can the instruction: base href="___" help us here, in case the answer to point (2) requires long file paths? Thanks a lot for your kind help!