Hello,please don't get angry but how to install APK files from computer placed on "Downloads" folder,because as I heard Nexus doesn't have file explorer included,and "Downloads" native app shows "no Items" also tried to search using google now for my placed APK files on phone internal sotrage didn't found it,because it's probably should be installed but I don't know how to install APK files without files explorer (and can't download it from Google Play Store,because my sim-card doesn't work,probably it's broken) so anyone know any alternative way how to install APK files on absolutely stock Nexus 5 Rom without files explorer?