cancelling PRO subscription and PRO features

Good morning,

After about 10 years of use, I am considering cancelling my PRO subscription. I currently use features such as repeating tasks, subtasks and parking lot.

I would like to know if, after returning to the free version, I will lose my data and will I still be able to see the items saved in the parking lot or the subtasks I added in the past? 

I need this data as an archive of ideas. Will this be possible?