Run away from this printer as fast as possible. If the printer is up to date he should accept a PDF as the final output and not be bothering with native files.
I'm with Larry on this - it is a rather unusual request from the printer... unless there is a misunderstanding.
If this truly is correct and this is what the printer wants, try this script from Peter Kahrel (it will require your indesign file to be part of a book file, even though there is only one indd file):
this is untested by me but may offer a solution.
@RGBguyinaCMYKwrld – +1 to that what Larry and Colin already said.
But, in general, there might be really good reasons separating a document into individual parts.
Might be a colaboration workflow with several designers where the project began with one person…
Or in a DPS workflow.
The Swiss scripter Hans Häsler did a lot of scripts and one of them is slicing an InDesign file into pieces. Page by page, range by range or other criteria. The script comes in German language, but the source code is available, so you could translate it. It has a ScriptUI graphical user interface. A extensive readme file comes with the code (LiesMich_Aufsplitten.txt).
(Split Documents Script v515d)