Folder/group template files

I was messing around with templates in the hope of replicating a folder/group set up I’ve evolved for the financial year. It all works well.
Quick question though- I was looking at the reveal package files of the template in the finder and each folder had a DevonThink data file in it.
Do you need those files for the template? Do they do anything for the template or change how the folders/groups get imported?
I’ve done a few tests and haven’t noticed any difference. Just wanted to confirm before I committed to my template.

(It’s fewer steps to just add folders to the template in the finder than to adjust the folders in DT, export as template, import template as a test, adjust and repeat.)

Do you mean DEVONtech_Storage files? These files contain additional metadata which can’t be stored in the filesystem.