How to put a file into a VM without a malware breach?

How can you get a file into a VM without creating a potential malware breach? I was told to kill the internet connection, disable any type of sharing with the host, no copy paste, and no sharing disks, but how would I be able to get the files into the VM if it is secure from both sides? The file in question is about 36GB and there is a second file that is 678MB.

Thank you.