Hi Tara,
Welcome to Box Community and glad to help!
It seems that you still have free space from your Box account. To verify that, log in to box.com> Account Settings> Storage Used.
Additionally, your storage error could be due to your shared folders. You might want to check it with the folder owner. If that's not the case, please upload a screenshot of your error in this forum.
We'd love to further assist!
Hi Rona,
Thanks for your response. Here is a screen shot of my storage as well as the error message I am receiving when trying to upload. Please share more information on what I need to check with folder owners of shared folders?

