Replicant

Hello,
I installed replicant 6 a few days ago on my i9300.

I remember having accessed to several options which disappeared, for instance, when accessing Settings/developer option, I currently got "developer options are not available for this user" message while I remember getting a complete menu.

I also can't configured my phone to access it as a USB keystick. I simply can't find the option I used a few days ago.
I can't access to Settings/User option, it does not open.

In Settings/About phone, when clicking 7 times on Kernel version, I got a "Device Id is not available on this build" and SELinux is defined to enforcing (it seems to me it was different after installation but I am not sure).
However I am sure I had these rights after installation since I got adb access and USB keystick access to transfer files.
I can not access to my phone with adb, I do not know if this is linked.

Could it be my device which has been "unrooted" during process? I had to flash modem image back when I had EFS problem.
I have access to recovery and download mode.
At least, I need to access my phone as USB keystick to save backup and install the phone again.
Do you know how to do that?

Thank you for your help.