As an example: When opening a spreadsheet it only gives me the option of using excel or office mobile. Both give me the same “Try saving the file on the device and then opening it” error. I have sheets installed as well but does not give me the option of opening the file with it.
I also have owncloud. When using the owncloud app it gives me the option of sheets, excel or office mobile. All 3 open the spreadsheet just fine.
As the other user said, pictures open fine. Office related files do not. Thing that’s interesting is that owncloud app works but nextcloud doesn’t…
I had the exact same problem on a samsung Tablet with android 7, not only with word and excel files, but also with pdf files. Changing the storage path solved it.
Thank you so much for sharing this solution