When u want to find a page's ftp file location, below is a method:
1. Inspect the page that you want to find
Normally all the component or module been used will wrote at the body's class
As you can see, there is com_content, view = category and loyout = blog (usually we can find from the template file)
2. Go to ftp and find the location
template -> ur template -> html -> com_content -> category -> blog
Click inside blog, u will see nothing inside, just a require.
3. Now we can write file to read the actual location on it
4. Then read the write file
U will able to view the actual location on it
5. Then go to the file location
Then u will able to file the actaul file
U can start ur customize work now!
Summary: Inspect to view the body's class is easily method to find the page's ftp file location.