how are you trying to add them?
(card reader, usb cable?)
Here's an easy step by step to get pics or mp3's or even movies onto your memory card.
What you will need:
MiniSD memory card
MiniSD to SD adapter
USB card reader
Place the card into the adapter, then into the USB card reader that should be atached to your computer somewhere.
Erase all the data from the card or "Format" the card so it is completely blank.
Place the card into your cell phone and power cycle the phone (turn it off and back on again). This has created folders on your card...
the folders should be->
To verify this, you should then take the card out of the phone and place it back into the adapter and card reader atached to your computer.
Now simply drag and dro...
If you would have asked about Ringtones on this LG phone, you would have been informed that you need to use a program called "BitPim" and a BT-dongle or USB cable to get them on the phone for free. OH, you probably want to pay for them. Well then, simply use Verizon's Get It Now service, and you don't need a card-reader.
Why do you think you wasted your money on a card and card-reader?
Do you NEVER anticipate wanting to transfer pics from your phone to your computer? or wallpapers form your computer to your phone for free?
Are you planning on NEVER having even ONE .mp3 song on your phone?
Are you AFRAID to put full-length movies or tv-shows ...