Daemn42
Thank you for the reply. Maybe the hidden trash can is the case, I'll have to try a deeper dive than just using Finder.
I tried clearing the memory several times using the mobile (android) app by the method you described, but no luck.
Going to borrow a windows laptop from a friend this week and see if I can't format the storage. Mac doesn't give me the option wether I'm connected via usb or wifi.
could be that my android phone and my wife's macbook are both a few years old...