Point 1 :
Currenlty, it is not possible to import 2 files with the same name.
Following error is encountered :
However, it is possible to rename a file with an already existing name : no error is encountered :
Point 2 :
Similar point :
a - I import a file name "Ametys.jpg".
b - I rename this file to "Ametys1"
c - I try to import "Ametys.jpg" => Nothing appears (no error message, and file is not imported).