I'm sorry about the issue. Do you have windows xp, vista, or 7, or 8, 10?
Do you mean you have many pictures on the SDHC 16GB memory card (when viewing in the camera), but you can only transfer a few pictures to the computer?
After inserting the memory card to the computer, can you open Windows Explorer (or File Explorer), then there, open Computer (or This PC) on the left, then open the memory card drive letter there, then open the DCIM folder and/or any sub-folder, then do you see all your pictures there?
Please reply at the box below. Thank you,