excuse me to be late, but I did' nt see your question: I don't receive email when someones replies me (even this option is checked).
an image of the xls file is below: you can see the link in blue. When I click on this link, it opens a picture.
Since my message, I 've found a solution I want to share:
All the pictures are in a single file. I use photofiltre to reduce the sizes of all pictures (*.jpg). It does it all at once, and after that, I use JMP with "import multiple files" which create a new file with all my pictures. After, I join this file .jmp with a data table file . jmp , and all is perfect !