Multisite to multisite ftp error : The specified directory does not exist

Hello,
I’m trying to migrate via ftp a multi-site install with one live site and one site waiting to be completed, to a different host (current host does not support wp multisite). If necessary I can delete the second site at this stage and re-create it later.

I’ve got a multi-site installation on the new host and created 2 sites to migrate to. Both of them are completely new and empty. The main site of the original site will be migrated to a sub-domain of the new network, that allows me to migrate first the content, then the domain name, without any interruption.

I get an error saying “The specified directory does not exist on the destination server.”

I’ve indicated “/home/lesbeauxgv/www” for the directory path. Here is a screenshot of my ftp : https://photos.app.goo.gl/GUMnnQyDTg9bDRXJ8 the site is installed in the www folder.

What am I doing wrong ?

Thanks in advance for help.