I know this question has been asked a lot. I've tried all the solutions, such as formatting, reboot, remount, etc. But my microSD still read-only.
I have partitioned my Micro SD into 2 partitions and 1 of partition I mount it as /data in my android and the last one as SD card.
/data is one of the storage space in android (ex : /system, /data, /cache, /etc)
OS : Ubuntu 14.04