Going on a trip in a few hours, and I need to download some movies. No storage left, but I have a micro SD card with 28 gb storage, and none of it is used. my normal harddrive on my phone is full, and I cant download anything more on it. However im not able to make my SD card the main harddrive, even if I have put it as the main one through settings. How can I make my SD card to be used? I need help fast! I have a huawei phone.