Sorry, I'm not sure about the defaults anymore (because I run all my shares secured for user/password access) Here's my recommended fix for you: From a terminal, get the uid of your user # id ken-ji uid=0(ken-ji) gid=100(users) groups=100(users) Typically it will be 100 Make sure Dropbox docker is stopped. Execute # chown -Rv uid:users /mnt/user/appdata/Dropbox/* Replace uid = with the uid value (or your username) /mnt/user/appdata/Dropbox/ - replace with where yo