The Best Way to Make DLC System (Pak File and Mounting them)

Hello there

I need tutorial how to make DLC system (blueprint or C++) for the correct way how to do that

I ‘ve tried to make Pak file ad Mounting it and in the log, the assets appear but can’t load them

so I need to know how to do that (load assets from DLC system in the games) in the right way because I didn’t know where I ‘am wrong (creating Pak files or Mount them)

thanks for your time