There is no need to mount it as an external drive. Either download them with your browser on your phone or plug your phone in. Do not mount it as an external drive. Copy/paste them to your sd card. Reboot to TWRP. Then flash the zips as instructed.
Also did you unmount your card after copying these files? And finally make sure you have "use external sd' checked in TWRP.
PS You don't HAVE to place those on your SD card but its good practice to NOT clutter up your internal storage with flashable zips. Some ROMs can be 600 meg or more and you will quickly find yourself running out of room.
Sent from my EVO using xda premium
So, it's not a matter of how they are downloaded or where they are saved, the zip files simply don't show up in the folders that they're saved in when browsing in the win recovery module under the 'install' button. I re-downloaded the files through the phones browser, verified that they are indeed in the downloads folder on the SD card, and when I try to select them in the win recovery, they simply don't show up. I copied them to the DCIM folder, as that is easily recognizable in the file structure,
and the files simply aren't showing up.
The win recovery image that I am using is
openrecovery-twrp-2.5.0.0-jewel.img
The supersu zip that I'm putting on the sd card is
UPDATE-SuperSU-v1.25.zip
The Busybox zip I'm saving on the card is
Root_Busybox_1.20.2_Only.zip
I hate to sound ignorant and ask for someone to hold my hand, but I'm somewhat tech savvy and am not sure how to proceed from here with everything that I've tried.
When you boot into the TWRP, what exact buttons do you push from the TWRP first screen to flashing the files in your download folder on the SD card? I am hitting 'install' (it automatically goes to the /sdcard), then I click 'Download' (the default download folder on the sdcard, where I verified that the files exist), and the folder shows nothing. What might I be doing wrong?
Thanks for the writeup btw, and thanks in advance for your help!