I have checked out this question How to make read-only file system writable? but I still have the problem.
My option is 'rw', but it does not help, I still can not write files and delete
mount| grep 0001-E856
/dev/sdc1 on /media/0001-E856 type vfat (rw,nosuid,nodev,uid=1000,gid=1000,shortname=mixed,dmask=0077,utf8=1,showexec,flush,uhelper=udisks)
Other options:
Phone is Nokia x2-02, connected via mini usb cable and with a micro SD card.