[Command] Save list of files as txt file

* If you want to get a list of files in the folder

1. open the 'cmd'
2. move to the folder location

dir /s/b >list_name.txt

* If you want to get a list of specific extension file in the folder

1. open the 'cmd'
2. move to the folder location

dir *.txt /s/b > list_specific_name.txt