Why does my coolpad rouge not have default write disk on it?

[Cj Parks]

I put in an SD card but my phone won't let me put my selected storage to SD card

 

[B. Diddy]

Welcome to Android Central! This is not standard on all Android devices. Some might have that feature built in to the firmware, but most won't let you set the SD as default storage for all apps. For certain apps, you can set it as default, though (like the Camera).