Wanting to upgrade from free trello to paid trello - are all cards and boards pulled over on upgrade

[Gillian Stewart-Goble]

Hi Team

What happens when upgrading a free trello to a paid subscription.  Will all the current boards and checklists etc be pulled over to the paid subscription without changes? Are all the current team members included in the new sub if a subscription is paid per person that covers those on the boards? 

If in the future we wish to decrease our membership back to the free option will we lose information or boards??

Thanks, G