Download the u4 version dump file with emmc userpart files for Samsung A12 (SM-A127F) Exynos cpu mobile. download the dump file from blow file download links, using the dump file you can fix emmc-related issues and fix mobile.
Samsung A12 (SM-A127F) U4 Dump File
SM-A127F U4 user_part
Patched Samsung Odin Flash Tool: Odin3 v3.13.1_3B_Patched_repairhost.com.rar
How to install dump file Samsung A12 (SM-A127F) Mobile Emmc
Here we use UFI EMMC ToolBox to install the dump file you can also use the Easy JTAG Plus Box.
Download the dump file and extract using Winrar or 7zip software.
Open the UFI toolbox and connect Emmc to the UFI socket.
Identify the emmc in the UFI emmc toolbox.
Select the extcsd, userarea, boot1, boot2 files and write on emmc.
Emmc is ready to flash Firmware.