You may need : https://samsungodin.com/download/Odin3_v3.13.1.zip
-Extract the SM-A707XX_1_EXAMPLE_0000000_fac.zip.enc4 file with 7zip or any other unzipper.
-Copy the (AP_A707XXXU1ASIX_EXAMPLE_0000000_user_low_ship_MU LTI_CERT_meta_OS9.tar). AP .tar file and transfer it to your internal storage.
-Download and install Magisk Manager APK https://github.com/topjohnwu/Magisk/...ger-v7.3.5.apk.
-Open Magisk Manager and go to Install > Install > Select and Patch a file.
-Navigate through the storage and select the extracted AP file.
The firmware will be patched and will be found in Internal Storage/Download/magisk_patched.tar.
-Transfer the patched file to your PC.
-Turn OFF your device and boot into DOWNLOAD MODE.
-In Odin, click on AP and select the patched .tar file, Uncheck “Auto Reboot” and click on Install.
The tool will flash Magisk V20 on your Samsung Galaxy A70s.
To boot in recovery or boot the system with Magisk installed:
1. Powering up normally → System with no Magisk
2. Power + Volume Up → Bootloader warning → Release all buttons →System with Magisk
3. Power + Volume Up → Bootloader warning → Keep holding volume up → Actual recovery