A flash file is the complete software package (Firmware) designed specifically for your phone's hardware, which includes the Qualcomm Snapdragon 439 processor. You typically need this file to:
Moving between different MIUI versions (e.g., from MIUI 11 back to MIUI 10). redmi 7a flash file
When the phone hangs on the Mi or Redmi logo and won't start. A flash file is the complete software package