I hope someone can help. I received what I believe to be the lolipop update for my Nexus 7. It down loaded fine, however, when I went to hit on the file with my finger to install, I must have brushed it to the side and lost it. I have it under my apps in the down load icon. The file is :nakasi-lrx21p-factory-93daa4d3.tar.How do I install the update and what file is it. When I hit on the file with my finger it says : can't open file. Can someone please help!!!!