In order for us to provide better support, we need to see the log generated by Citra. This guide will walk you through how you can obtain the log file: How to Upload the Log File.
If you want to transfer all of them, go to your desktop Citra build and click File>Open Citra Folder. Now copy the sdmc folder found here and paste it on your Android device in Internal Storage (sometimes called SD-Card because google is dumb)\citra-emu. This should transfer all of your save files. Keep in mind that this will also overwrite any progress you’ve made on Android for games which you’ve also played on desktop.