Create a folder to the desktop and export all your work to that folder and copy it to the SD card.
Also, there could be a issue with SD Card, so you can format the card and then try using it.
Let us know if it helps.
Thanks but didnt work
The card reads fine for shots directly out of camera but files transferred back to it from LR are not seen by i pad.... even via desktop folder
Please try and copy some other images files from your system to SD card and see how it works on the Ipad
Exported images (to card) show up on my other Mac but not in i photo auto import and not on i pad.
My lightroom is on an older mac using last Op system before Yosemite....could that be it?