This is a general question and I am only requesting a general answer. Thanks if advance
On a Raspberry Pi, if I install multiple boot options like, LibreELEC, Raspbian and Recalbox, how is the user read/write disk space allocated or shared between the OS. Perhaps Recalbox is not really a "linux" system. So it is not similiar to LibreELEC and Raspbian, let me rephrase the question to two those operating systems.
If I have a dual boot system like LibreELEC and Raspbian, how is the disk space, user storage shared or divided between the two operating system. For example I have files in raspbian under ~pi and and stored movies under LibreELEC.