I didn't re-install Link2SD anymore because I'm afraid it may break my phone.
1- What is the maximum size of the ext2 partition?
2- Does it work on SM-G900H without issues?
B- Despite what they say about Kitkat and that you cannot move your apps to SD card, I have the option on my phone to move (movable apps) to SD card and that's good enough for me. I purchased a SANDISK Extreme plus 64 GB SD card (Which is formatted in exFAT by default). When I move apps to SD and reboot my phone, all the apps on SD disappear and my phone starts acting weird and apps crashes. Maybe it's because of exFAT but I'm sure the SD card is fine and not broken. That's why I wanted to try Link2SD and see it it solves the problem.
Have anyone faced theses issues? Anyone know a solution for these problems? I appreciate any help.