I keep all my back up folders of years of family pictures on my PC and want to transfer them back to my iPhone, once organised, to view and share. It is not possible to copy folders from the PC to the "Sync from Computer" folders. iTunes used to do it (slow) and the Apple Transfer app takes forever and keeps crashing. Can you add this feature so I can drag and drop them over?
Thanks for the idea for CopyTrans Studio. Now the program supports adding photos to the Camra Roll.
If you want to transfer photos from Pc to "Frim my Mac" folder, please use CopyTrans Photo: https://www.copytrans.net/copytransphoto/
The function is supported there.