I just watched the video posted here on your site, but I don’t have that option to permit to request permission. I have the SD-Card and storages section. When I click on Show detected storages, the system is displaying full access to both the external and internal SD cards.
I just purchased Magic Dosbox the other day, so I have to believe it’s the most recent version.
I’m having the same issue with Daggerfall; I followed every step correctly but I just get that blinking cursor.