Files and folders in your workspaces can easily be renamed at any time. Administrators, Moderators, and Collaborators have permission to change file and folder names. In addition, Creators who created the file or folder can change the name as well.
Just hover your cursor over a file or folder and click the options (⋯) icon that appears in the actions area.
Click the Rename option.
Then simply edit the name and click Update.
When updating file names, be sure not to remove or change the file extension (e.g. .txt, .pdf, .docx) unless it is incorrect. This is used to determine the type of file and what software can open it when it is downloaded and opened by some operating systems.