The current PSJB compatibility lists say that Heavy Rain will remove all PSJB content. (games installed, saves of PSJB games etc.?).
I don't know how to would work. But I already have a Heavy Rain HDD installation, from the disc.
If I now would go and copy the Heavy Rain from my PC or Disc to Ext HDD/Int. HDD. Would it still remove PJSB content?