I am looking into something for work and I need to know what type of flash-memory storage is most common in digital cameras so we can look into how to properly eradicate all of the data on the cameras's internal storage. I understand that there is more than likely not just one type of flash-memory in all cameras, but this is proving to be a difficult question to find the answer for, as all of my searches come back with information pertaining to the SD card for the camera. I am also trying to find out if a simple overwrite will be sufficient to ensure the data is permanently erased. these questions are aimed at digital cameras that were manufactured from 7 years ago to the present.
-Thank you in advance!