services.transmission.downloadDirPermissions

If not null, is used as the permissions set by transmission-setup.service on the directories , and . Note that you may also want to change .

Keep in mind, that if the default user is used, the home directory is locked behind a 750 permission, which affects all subdirectories as well. There are 3 ways to get around this:

1. (Recommended) add the users that should have access to the group set by
2. Change to be under a directory that has the right permissions
3. Change systemd.services.transmission.serviceConfig.StateDirectoryMode to the same value as this option.