Until now, by every boot my NTFS partition (sda3) was mounted for reading and writing and I am the owner, not root. Suddenly, I can't write to it. Here is what fstab looks like, and mount. Could it be that doual-boot Win did something? Fastboot, some flags by NTFS?
And here is mount cmd where it says 'ro' and permissions in Dolphion
Edit: It is not a duplicate of this, because there was a problem with ntfs-3g missing which was 2011. thing.
