I wrongly denied permission to saving backup. How can I allow?

When you backup Reminder FLEX data first time, Your device asked “Permission”. And if selected “Deny”, in that case you need to allow permission from settings to save backup.

First, go to settings in your device.

Then, apps > Reminder FLEX.

> Permissions.

Click “DENIED”.

Then change to “Allow access”

Now you can backup your Reminder FLEX data to Download folder.