Backup and Restore instead of initial sync?

This part of provided suggestions are pretty helpful. I am still in the process of digesting them. Do you have any insight in regard to the scenario 1 that I mentioned in this thread?

I am trying to avoid the time waiting for cloud-to-local sync time because I have 25000+ notes, I stored my notes in a complicated folder tree following specific ontologically taxonomic method/directive, and the cloud-to-local sync only conveyed me the folder tree at the ending time of three-days sync process, which means, I practically can not access the taxonomic resources during the wait.