Where are my files going?

[AC Question]

I have a Galaxy Tab 4. I downloaded some Audiobooks to my MicroSD card for a long air flight. I put the files on the sd with my computer. When I put the SD card into my device all the folders were there but the files dissappeared. I plugged the SD card back into the computer -confirmed the files were missing from the folders and put the files in again. The second I put the sd card in my tab, they dissappeared! Then I tried connecting my Tab to the computer with the SD card inserted and again put the files on the card. They were there and by time I got to the airport all my folders are gone again!

Its a san disk. I formatted it before I started this process...

 

[dpham00]

I would try to format the card in the phone