I think it is different for digital storage.
It costs nothing to make copies. Furthermore, data being automatically copied and erased there during defragmentation and etc. This is how it is in "permanent" memory (harddrive or flash memory)
In operative memory it's even more volatile, everytime you are opening/closing application or that picture it's being copied and deleted in operative memory multiple times.
The same, like when you are reciting Quran, sound appears and vanishes, you can't say that you are destroying Quran because sound vanishes.