Problems With My 4gb Memory Card Please Help!!!!!1

Did you format the card in phone or pc? Format with the phone. And if you transfer alot of pics ( I don't know how many) the phone has to index all the pics. Might take some time depending how many you put on.

Or if you are copying a bunch of folders full of pictures, they might contain some other files as well, such as thumbnail files or other files that windows creates, or some of them might be corrupted or something.  This happened when I transferred my music library. I copied my whole itunes folder, and evidently it had some bad files in it, and it would freeze all the time.  So I just copied all of the music files, with no folders or other files and it works great now.  So you might try copying just the pictures, or if you want folders make them on the memory card and transfer the pictures from each folder to the folders on the memory card.  That might have been a little confusing/bad grammar so sorry!
But hope it helps.