Opening, sharing, and managing OneDrive-stored documents directly within Teams
Dear Shannon,
I'll help you with your question.
When you create a team in Microsoft Team, it will create a SharePoint site with same name, each channel in the team it will has a folder with same name in the main documents library inside the site.
I suggest you to open the site directly and verify if the folders are there, so in the "Files" tab inside a channel in the top bar, click in the option "Open in SharePoint", then checkout if you are able to access to the site.
Take a look at below link for further information:
https://docs.microsoft.com/en-us/microsoftteams...
So, if you have Edit permission over the SharePoint site, you can move the files between two sites, so open the SharePoint library find the file > right click over it > click on Copy or Move, depending what you need, then in right pane it will appear the others sites where you have access, so you can move the files to the site what you have selected.