I've been in the backcountry without cell or Wi-Fi. Suddenly Earthmate opens on a screen that says Insufficient Storage delete content IF that doesn't help delete the app and reinstall it. What? I had no cell or Wi-Fi!! The screen is frozen, offers no way to delete anything.
After multiple hard restarts my usual Earthmate screen appeared. Then it went back to Insufficient Storage etc. More hard restarts and at this moment it's working fine.
As soon as I could I drove to a spot with cell. I looked up solutions. None. I'm not willing to delete and reinstall right now. I depend on it for my safety. It's working. If it works don't fix it. But I have six more days in the backcountry and I don't trust it. Please post more information on this issue!