I've some issues about problem to set SD card as an internal memory on my phones. FYI, i'm using vivo phones (android 9.1) with 3/32 RAM/ROMS spec. So, my question is how can i set my SD card as my internal storage on my phones? I've already know the basic step guide is usng the function on settings but on my phones when i go into the settings on the part "RAM and storage space", it's just show the menu info for my SD card and the others menu like mount/unmount SD card and erase SD card but the menu to set as internal memory or formatting isn't there. So, how can i set my SD card as internal and if the manufacturer block that functions, did have anyway to set this SD card as internal memory?