cropping photos, audio or video items would be the ones already in memory
Now try to follow along, Newbie...
Memory only temporarily "stores" data to give the processor more "elbow room", so to speak.
The purpose of memory, is to offload commonly-used processes from the central processor in order to speed up those processes. The more RAM (random access memory), the faster most processes. The moment the finite memory available is maxed-out, or when a higher priority file is assigned to RAM, or when the system is shut down (turned off), the temporary files in memory are either substituted or dumped and all info temporarily residing within RAM is lost. It has nothing
to do with file storage. Period. End of discussion.
Files are 'stored' on the drive, NOT in memory.