Dear Bernd,
Thank you for clarifying. Unfortunately, I'm still stuck. When I go to Adobe Reader, the system tells me "This app has access to: PHOTOS/MEDIA/FILES uses one or more of files on the device such as images, video or audio, the device'S external storage"
Then it says "Choose a device" and only 2 options are highlighted (my new and old cell phones) "Verizon Wireless Motorola XT 900" and "Verizon Wireless LG VS 4G". THEN in light gray and not highlighted "no carrier Samsung SM-T 900 your device already has this item installed". HELP, please again. I still can't get it to kick in and read my attachments. Advice? Thanks, again. CC...