Random Access Memory is a temporary storage area. It keeps the files that are needed currently by the system. Once the file is used, it will be cleared off from the RAM. If they are commanded to be saved, then they are stored in the internal or external memory. Every ongoing system service and apps will be opened and temporarily memorized by RAM.
If a system needs to open a file, first it is located on the storage then taken to the RAM. The file remains in the RAM until the job is done and the file is closed.
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