Hi ​@kmdchew 

Organizing documents within Team Documents feature has limitations for standard and Pro accounts, as custom subfolders cannot be created.

• Despite this, there are other solutions to help you effectively manage your documents. For Enterprise accounts, admins can create centralized shared folders, acting as subfolders, to reduce clutter. On top, you can create personal or shared folders outside the main Team Documents area and grant access to team members or specific groups.

Similarly, utilizing document tags combined with advanced search, or implementing consistent naming conventions, can help categorize and quickly locate documents, maintaining order and efficiency even without folder organization

To learn more - Organize your documents with Groups and Team Folders | Community

Hope this helps - Happy to help further!!
Thank you very much and have a great one!
Warm regards

I’d add this as an improvement suggestion to the product as your answer pretty much says that now we have to have additional effort to make supplemental spaces that are not within the teams configured.  Ideally, I’d think the product should allow for this, and a non-administrative for our Enterprise account, process. 

Hi ​@kmdchew, thank you for posting in the community! I’m happy to share more information about this. If you have a Team Hub, you should be able to add folders to the Team Documents section by clicking the blue ‘+New’ button on the left and selecting ‘Folder’: 

Alternatively, you should also be able to do this by right-clicking a blank space in the Team documents view and selecting ‘New Folder’ from the menu: 

Please note that only an admin can move folders into a Team Hub. If you are not an admin and you need to move a folder into a team hub, share the folder with the account admin and ask them to move it into the team hub.

For more information about Team Hubs and related functionality, I recommend checking out this Use team hubs in Lucid article from the Lucid Help Center. 

I hope this helps. Feel free to let me know if you have any questions!