Q: transfer pictures to ipad using Apple usb adapter

Pictures have to be formatted in a DCIM folder on the top level of the card, with photo names of 8 characters, no symbols anything else and it just won't see it.

SDXC card are not support.

Another way. You can use a USB flash drive & the camera connection kit.

Plug the USB flash drive into your computer & create a new folder titled DCIM. Then put your movie/photo files into the folder. The files must have a filename with exactly 8 characters long (no spaces) plus the file extension (i.e., my-movie.mov; DSCN0164.jpg).

Now plug the flash drive into the iPad using the camera connection kit. Open the Photos app, the movie/photo files should appear & you can import. (You can not export using the camera connection kit.)

Secrets of the iPad Camera Connection Kit

http://howto.cnet.com/8301-11310_39-57401068-285/secrets-of-the-ipad-camera-conn ection-kit/

 Cheers, Tom

Per Using the iPad Camera Connection Kit

http://support.apple.com/kb/HT4101

Here are the supported SD cards and image-transfer protocols:

    •    Picture Transfer Protocol (PTP)

    •    Mass Storage Device protocol

    •    SDSC

    •    SDHC

    •    miniSD

    •    microSD

    •    MMC

    •    SDXC (supported only when not formatted as ExFAT)

 Cheers,