I have a really dumb newby question... I just bought a reader and am waiting for delivery.... I know I'm going to max out the memory (I've already downloaded lessee.. checking now... 256 books... I'm like a squirrel hiding acorns here. i love old books and have went through the manybooks website downloading any and all i found even slightly interesting) so I bought a memory sd card from amazon. I got this product... (SanDisk 2 GB Extreme III SD Memory Card)

I hope that was the right one????
My question is, (And bear with me because i'm kind of computer challenged...)
Do I just what, slip the card into the device like I do my camera memory card and never open the reader again using the software and usb cables to transfer files to it or do I have to buy another umm.. Card reader.. (Whatever that is) and transfer files to the card, then put the card into the reader every time I get new books, (Which I'm certain will be regularly)
I was kind of hoping for the former rather than the latter procedure.
Can anyone hold my hand and lead me through the baby steps...
Thanks. Roy