A little background: I recently wiped my phone and flashed the Sense 5 Android 4.3, stock rom. Now I'm trying to flash Viper 4.0.
First of all, as the title suggests, whenever I put a zip file on my phone it doesn't show in the TWRP recovery. I downloaded the correct one on the site (the newest one for the HTC EVO 4G LTE) so I don't think that's the problem. Also, I tried to push the file Viper zip onto my phone using this program called WinDroid Toolkit, and it claims it did but when I go into TWRP I cannot see the zip file at all, and if I try to use other folder names (such as the 'boot' folder I saw when I was in TWRP recovery) it says those folders don't exist!
Second of all, TWRP claims there is no OS installed on my phone but when I reboot my phone, it's fine! It just goes to the home screen as usual and it works perfectly fine... so I don't understand this warning but I couldn't shake the feeling that this was relevant to my issue.
I've been combing the forums looking for this type of problem, and I've tried multiple things but to no avail. I've read snippets about partition problems after formatting some phones but I'm not sure because there doesn't seem to be much information about it (at least from what I could find).