Interleaved
Interleaved audio files are audio files that contain more than one audio channel such as a left and a right channel for stereo audio files. ... Pro Tools now allow the use of stereo interleaved files.
Should I use interleaved in Pro Tools?
There's no difference in quality or file size between either - it's just a matter of preference. In previous versions of Pro Tools, you could not work with interleaved stereo files, everything had to be mono and stereo tracks were a combination of two mono files.
Is interleaved stereo in Pro Tools?
Protools calls normal stereo-files stereo-interleaved. So that is what you should choose in your bounce to disk if you want an ordinary stereo-file....