Thanks a lot for your marvellous post.
But, for these files, I obtain this message when unrar:
"A checksum error (2) occurred during Unrar, or an invalid password was entered".
So: impossible to join and expand files… (Only the first part can be expand).
There is no password for your files.
Should I change something in the name of files?
Have you any solutions?
Many thanks for answer.