Connect your Android device to your computer and simply copy the diy_quiz.txt file that you created to your device's Download folder.
You can also email the file to yourself by adding it as an attachment to the email message. Then open the email on the device and save the file. It should automatically be saved to the device's Download folder.
Remember that the file must be in the Download folder as the Diy Quiz app will only look for the file in this folder