How Can I Access the Files in My Phone's Internal Storage Using Kali?

I have download Kali Linux on Android. I was trying "How to hack android remotely" tutorial. But, after creating the app file, I was not able to locate it. It was not in my phone's internal memory. It was in the root folder. I tried to copy it into my phone's internal memory, but I was not able to find the directory for my phone's internal memory. How can I access, add and remove files in my phone's internal storage using Kali?