When a file is still in the process of being uploaded, it will be displayed in a directory listing as a partial file . While a file is in the partial state, it may continue to receive appending content (i.e., grow larger), but only the original user who began the upload will be allowed to add this content. (Once a file is closed and made ready for download, no additional content may be appended, not even by the original uploader.)
Partial files may not be downloaded by anyone, and will be hidden from some file list views, including FTP directory lists performed by users other than the original uploader. Partial files may be deleted, however, if the user viewing the partial file entry has sufficient permissions. Partial files will also usually be deleted from the system within 24 hours. (In other words, broken uploads must be resumed without 24 hours; otherwise there will be no file on the server for a client to resume an upload to.)