It is highly recommended to use one of the following methods while your phone is still functional: Method A: Using a Root Explorer (Safest Manual Way) Root your device. Install a root-enabled file manager (like Solid Explorer Root Explorer Navigate to the root directory (the very first folder Locate the folder named Copy this entire folder and save it to your external SD card Method B: Using TWRP Recovery If you have TWRP Recovery installed: Boot into TWRP. Uncheck everything except
Troubleshooting Samsung Galaxy J7 (2016) SM-J710F: A Guide to the EFS File
The EFS (Encrypted File System) is a dedicated partition on the internal storage. It holds: : The unique identifier for your device. Baseband Version : Data for the radio modem. Connectivity Data : MAC addresses for Wi-Fi and Bluetooth.
The EFS (Encrypted File System) is a highly sensitive partition in the internal storage of Samsung devices. It contains unique hardware-specific information including: The international mobile equipment identity. MAC Address: For Wi-Fi and Bluetooth identification.