Default Need help reviving my One

I'm in a pickle and I hope someone will be kind enough to try to help me.

I can get into HBOOT and TWRP recovery OK. I don't have a ROM on the phone to flash. I have one Nandroid but it fails (not enough space).

I have Minimal ADB and Fastboot (version 1.0.31) on my Windows 7 Pro machine. I can get fastboot to recognize my device, but not ADB.

How can I get a ROM .zip into the phone?