To protect the integrity of the repository, the wizard does not allow you to copy a folder when the folder, or objects in the folder, are being saved. Likewise, you cannot save objects in a folder as the wizard copies the folder. Before you copy a folder, view object locks to verify that the folder is not in use.
If you are replacing a folder in a target repository enabled for versioning, you must also verify that no objects in the target folder are checked out.