Ok, I need to check a few things when I get home tonight for you.
But can you confirm a few things for me?
What are the types of SD cards you are using?
Is it only MP3 files you cannot transfer?
1. Can you try and transfer a single album?
2. Can you also transfer a single album, 1 track at a time?
Try these 2 on all your methods of transfer.
You should be able to media share through media player and various other apps.
And God said: DELETE lines One to Aleph. LOAD. RUN. And the Universe ceased to exist.
Then he pondered for a few aeons, sighed and added: ERASE. It never had existed.