Unhappy [Q] How to transfer rom in the recovery philz

Hello everybody,

Today I wiped my phone in order to install my new rom on my LG G2 (4.4.2 rooted) using the philz recovery. Little did I know that I forgot to transfer my rom from my computer to my phone (what a fool). I then tried to use the 'mount USB storage option' withouth success.

My question is, how can I transfer my rom from my computer to my phone using the recovery? If it is not possible how can I get out of this situation (I'm even willing to go back to stock but the threads I found require to start from your phone in debuggin mode or smthg like that that I cannot do)?

Feel free to ask anything that might help you solve my problem.

Thanks in advance.