Any recording engineers or music producers out there? I need help with these instructions:Your Pro Tools file should be a very small file, and it should have a .ptx file extension. DON’T upload any

Any recording engineers or music producers out there? I need help with these instructions:

• Your Pro Tools file should be a very small file, and it should have a .ptx file extension. DON’T upload any audio files, just the Pro Tools session file! 

Note: I had to put this question under engineering, because I couldn't any subjects related to music, technology, or music production. Sorry about that!