Storage full

Hi Lauren, 

Welcome to Box Community and happy to assist!

By any chance, are you uploading file(s) in your collaborated folder? Please have the folder owner to check his/her storage allocation to make sure that she/he has enough storage to store more files in Box. 

For further assistance, you may also open a new ticket via https://support.box.com/hc/en-us/requests/new. 

Thanks for posting!