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
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.