The working principle of CD/DVD discs:
XXX is:
But how does he remember that information?
The disk consists of small memory cells.
Or what’s going on on the plate?

YYY :
Yes, almost like a recording.
Only the laser "burns" tracks
When the laser lights on this path.
by reflection he understands the information

XXX is:
How does he survive her?
Is there a fingerprint?
The image is reduced?? to
Or how?

Caroche, the disk is just smart and just remembered it all...
He just has a good memory, and the size of his memory depends on the inscription on it.