I don't know what the prob is but I was able to write to my sd card this happened like a week ago I was on a 4.4.2 two rom and had no issues with it then I went to an aosp room still no issues then I flashed another aosp rom and that's when I noticed the problem I can read the sd card I can even copy stuff from my external sd card to my internal one no prob but when I try to copy something from my internal to external I get an error message saying read only file system I tried those sdfix apps I tried a couple of them and they all say I'm good I have permissions to write on the sd card but I still can't. Has anyone had this prob or can point me in the right direction any help will be appreciated.