Autocomplete filename from current directory in current buffer [duplicate]

Question

So i have a bunch of files in a directory. I'm editing another file which have broken links/reference to these same files, and i want to edit them.

There isn't too much so doing it manually wouldn't take long...but how do i autocomplete their filename in the current buffer? example:

examplefile.txt

to

examplefile[TAB]name.txt

Where [TAB] is just the Tab key being pressed, for the sake of illustration.