One UI 2.0 is not as smooth as it was mentioned on the videos surrounding it. My S10+ ram which is 8GB gets filled up pretty quickly. On average 78-80 percent of Ram gets filled up on minor use. Also the recent application transitions are very slow. ...
first backup your data to sd card using smart switch. then go to settings and search for reset. press reset, give Samsung password for verification and boom. phone resets