I solved my issue. When I copied old card data to new card, I put all pictures in DCIM folder and when I opened Gallery on the phone it did not, by default, open that folder, so I saw no pictures. When I went to albums, DCIM was listed as an album and all the old pictures were there. When I take new pictures, by default, they are saved simply to the SD card. Now that I know that access to pictures is a little different, there is no problem. By default, when I open Gallery, it goes to albums, where all the pictures are stored. Thanks for everyone’s help.