I have a Huawei GR5 2017 BLL-L22 cell phone running Android 7. There are duplicate files under Categories>Documents. For example, There are two "birthday 9-10.txt", both having the exact same date, time and file size. Another example: "18614_20190915 financial.xlsx". Again, same date, time, and file size. There are more.
The strange thing is if I delete the duplicate, leaving only one copy of them. Not before long, the duplicate comes back. I'm not using Cloud. I don't synchronize anything. Who or what is making the duplicate and how do I stop it?