The answer

When both Lanni and Luna were ready to face whatever was on the USB flash drive, Lanni inserted it in her laptop and waited with bated breath.

Even though she had prepared herself psychologically and despite having experienced many gruesome and shocking scenes, she still held her sister's hand tightly in nervousness.

Lanni patted the back of the other's hand. "It's okay. It's a good thing." This was the answer they were looking for, after all. She proceeded to select the 'external storage' on her laptop screen and was stumped when an authentication window popped up. They needed a password?

"Are you kidding me? Why would Flynn give us a USB flash drive that was protected with a password and not give us the password?"

It took a second for Luna to recall his words. "Wait. Aside from saying that the answer was with you, he also said that the answer is you. Perhaps the latter statement referred to the password?"