A flash file (firmware/stock ROM) is used to:
Downloading flash files from third-party file-hosting sites for obscure brands carries significant risks, including malware, bricking your device, or installing modified firmware with spyware. Always exercise extreme caution. kechaoda a26 flash file 2021
It seems you are looking for the for the Kechaoda A26 (likely a low-cost Android tablet or smartphone) from 2021 . A flash file (firmware/stock ROM) is used to:
Once the 2021 flash file is successfully installed: bricking your device
(search with Baidu or Bing):
Always backup the original firmware (read the flash) before writing a new one to prevent permanent bricking.