After update, I have succesfully moved all articles (good work), all menus (but without menuitems). Bad new :(
After this, I try to work with exported articles, but It doesn't work because it badly import a category tree!
Then my hoster set correctly the max execution time. I clean up the import articles and categories by this component and tried J2XML (free export/import tool). And it works perfect.
SP upgrade was useless for me :(