Targeting a different drive using extendscript

I'm trying to import a file into After Effects using the following command:

AfterFX.exe -s "app.project.importFile(new ImportOptions().file = new File([FILE PATH]))"

This file, however, is located on an external SSD. When targeting this file, After Effects adds "C:/" to the front of the path name, so it turns out like "C:/D:/file.mp4". I can't figure out how to fix this, does anyone know?