problem with sd card video door phone

hi I'm working on the code of a video door phone and I'm trying to improve it. with 16 GB SD card the pictures that the camera takes can be seen on the LCD but when I connect the SD card to PC using a SD card adapter it shows nothing is in the drive. with 2 GB SD cards it only shows the last taken picture and when I click to see the next photo a black page appears. the core microcontroller is a M8051W named BIT1802 i used standard commands provided by spec sheets for MMC and SDSC . can someone give me a hint about what the problem might be ? i attached the library i used.

just a guess, but i would suspect that the camera is saving data more like it would for a eeprom module than for a NTFS/FAT file structure, which is what the pc would use

a clue would be such as how do you pull image on LCD , do you go through an array of images in a list or pull by an actual file name and/or directory?

another helpful clue would be if you could dump the hex data of the image off of the card. in the hex data it will have a header that states image format and other such info that a pic viewer on pc needs.

I think DD is correct - you have no reference to FAT in the provided files, so it appears you are missing the entire filesystem layer??