I've got to the Android System Recovery 3e menu and tried clearing cache, which did not help. The option to do a factory reset is also there, but I need to backup my data first, and I don't even know if this will fix the problem.
I'm also able to enter download mode.
When connected to my PC it detects an unknown device named 'samsung_android", and it shows up in adb. I've tried doing a backup through adb, but it wanted me to unlock the screen to accept the backup, which I could not, because I'm stuck at the splash screen.
Is there anything I can do to save my data? Anything through adb? Install root (never done this before)?