Why specify "2021"? Between 2020 and 2021, clone manufacturers (often from China) released a flood of KESS V2 units with updated hardware to bypass anti-clone protections. The 2021 SD card images contained:

Users often seek an "SD card image download" because the internal memory of the KESSv2 unit is stored on a removable MicroSD card. Over time, these cards can become corrupted, or users may wish to upgrade the firmware on a clone device.

You cannot simply copy and paste these files onto a card in Windows. The KESS hardware looks for a specific disk structure.

Leo carefully took out the SD card from his Kess V2 and connected it to his computer. With a few clicks, he found the perfect image download for the year 2021. As the download finished, he carefully wrote the image onto the SD card, feeling a sense of excitement.