Lightbulb clone s5 4.4.2 external card issue

i have a clone S5 its a mediatek device have android 4.4.2 its not showing SD card in manage apps and don't move apps to SD only install to internal memory which is very low so i tried all the method available on XDA and via Google including modifying platform.XML also sdfix kitkat as well don't install it says older SDK but nothing seems to work if anyone can help me i will really appreciate that