copying photos from PC back onto SD card to be viewed on camera

Hello I have a question about SD card or to be exact how to view on camera photos copied from PC back onto the SD card. I would prefer to copy them back onto the SD card and to view on camera after I edited them on PC. However, I ran into a problem. I was able to copy from PC onto SD card – it’s pretty self explanatory you insert the SD card into the PC, it shows the SD card folder, you copy or drag files from pictures folder on the PC into the SD card folder (the folder is called DCIM). So I used this method and when I am on the PC I am able to see that the photo is on the SD card. However, when I insert the SD card into the camera and try to view the saved photo on camera it is NOT there. I tried formatting the SD card and used several different SD cards but had the same problem. I use Nikon D3300 camera. I would really appreciate if someone helps me out with this problem. Thanks so much. .

I ran into the same, or very very similar, issue with my Canon. I concluded that it just didn't work, at least not the way I was doing it. I can't even remember why I wanted to do that but it had something to do with getting photos imported to my iPad. The photos just were not seen the same way they would have been if the camera had saved them there.

I discovered two decades ago, with my Canon G1, that simply putting JPG files onto the memory card of a Canon camera simply did not write information into the picture storage directory on the memory card that permitted the camera to then find the file and display it. Even if the photo was originally captured by the camera and you used any program to edit that file, the altered photo could not be seen by the camera. That has been the way it was ever since. And now I know Canon is not the only one with this inability to see photo files put there from a computer.