How to undo a flashed SD card for Raspberry Pi400

I wanted to run a node on a Raspberry Pi 400 and have flashed Umbrel OS V 0.4.9 on the SD card delivered with the kit, if I want to use to Raspberry Pi 400 without running a node, as i flashed the SD card previously with Umbrel OS V 0.4.9 version do i need to flash the SD card again with the Pi 400 data? if yes, where can i download the RPi 400 driver data? thank you in advance for your support.

Use the raspberry pi imager. get it here https://www.raspberrypi.com/software/
But buy some SD cards (16 GB or more) to install images (Raspbian, games, servers, etc)

Thanks a mill LoboGuara for your support, much appreciated.