Desktop Client Cache

Description

I am currently looking into Data retention policies within Rocket.Chat. As part of this research a concern was raised about Caching of conversations on the client.

Has anyone done any research checking to confirm if conversations purged on the server are likewise purged from the electron client / web client cache?

I download playlists offline on my Mac, do you have any of your playlists saved offline? May sound a silly question, it could also be cache data of the program saving information to the hard drive Speed Test?