Default extsdcard. cant delete or move anything

So im stock rooted gs5 verizon here. I have tried editing the platform file to allow external sd card write privileges. But every time that I delete something on the extsdcard it pops back using. The items go away and all but when I restart my phone it just all pops back up. I dont know what to do at.this point to get it to work right. Maybe my sdcard is improperly formatted... I dont know. Can anyone help?