ramjet696

I am perplexed.
I have numerous jpg pictures on my DELL pc hard drive at home and want to copy them to a storage card to take to work to print and burn on cd for my family. I own a 128mb kingston sd and 256mb simpletech cf card. When I put them into my card reader and tried to copy jpg's from my pc to the sd, it maxed out at saving about 18mb. So I tried the cf and it only saved about 16mb of jpg files. What am I doing wrong? My ax acknowledges the capacity of both cards but the cards only save about 10% or so.
This is my first pocket pc, but I'm not computer illiterate.
Please respond. I want to use my cards to save music files too. How do I save them correctly?
Thanks