Hello Davidfor, thanks a lot for your answer and you are right I tried to either copy collections from KOBO to Calibre or from Calibre to Kobo. So it's why I posted 2 messages.
Today, I want only to copy collections from Calibre to Kobo and I follow the post what you gave me :
https://wiki.mobileread.com/wiki/Kob...nd_Collections (Finally, I think so...) but I can't find my column "Envie de lire" into my Kobo. Can you please see my attachment to check if what I did is correct. I click OK after to fill it and Calibre was rebooted (Sorry but my Calibre is in french...).
Thanks a lot to continue to help me.
Jean Marc