I have been trying to get the latest version of windows upgrade to run. I do not have enough storage space on the tablet. I am short 10 GB. I have run the disk cleanup tool, but I still don't have enough space. I have installed an SD card, but when the drop down menu option comes up for when windows needs more space, part B won't recognize the SD card and the dropdown/ refresh button is cut off for selecting an external storage source. How do I get the entire drop down menu to show up?