Hi @Hervé Morellon,
you can easily export a Trello board, in the Menu you will find a "Print and Export" button to export as csv or json file:
If you want to import into a new board however it's a bit more complicated, and you will need to use a third party addon as explained here.
The simplest way for you to move your data might be to copy a board and change the admins/users so that you can have your personal Trello account own it. This is explained here.
Let me know if you have any questions,
I have resolved my issue thanks to your tip.
In the boards I wanted to export and then import in another account, I have just added a new member in the team with the new account.
Then I've connected to the new account and have just copy the boards so they belong only to my new account.
Finally, easy, but you gave me the tip!
If you had to thrive a new habit during a lockdown, what would it be? Trello
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