Originally Posted by MrSparkles
my nexus 7 doesnt have an os installed and got factory reset how can i copy a rom to it and install with twrp? also nexus wont show up on my pc some reason reinstalled pc os recently didnt have nexus drivers installed
Well, you're going to need to install the drivers. Boot into TWRP, and find the ADB sideload option (forget exactly where it is), then adb sideload rom.zip. When you sideload a zip, it will flash automatically.