Multiple sheets (based on the same file) Altium Kicad import issue

The Kicad Altium import fails when import a Kicad V8.0.6 project with a single file (IO.kicad_sch) that involves multiple sheets (IO1, IO2,…) as shown.

The problem is that from the Altium importation I only get one schematic instead of seven.

I know it is an Altium issue but I’d like to know (as a workaround) if I can convert a single Kicad schematic file (IO.kicad_sch) into serveral files (IO1.kicad_sch, IO2.kicad_sch…) in order to open these files in Altium successfully. Any hints?

Look in the Kicad project directory with your file browser.
The Hierarchical sheets should be separate files.