Default files access when created with filemanager


i have a problem accessing files from Telekom Mediencenter App. When the Directorys are copied via an filemanager (between the storage of android), the directories are invisible to the app (looks like the ringtone bug). When i copy the files and create it by pc transfer then i see them

Can anyone help me to get the files visible with the resources available on android (without an pc) ?

best regards,