Some files upload and others do not. Several factors can cause some files to upload while others do not. They are listed below with possible solutions for each.
Out setting can prevent large files from transferring.
If the files not transferring are larger than others that are transferring successfully, increase the FTP Time Out setting. Some image editors create icon files corresponding to the image files in order to display the icon for that file as a thumbnail of the image on a Macintosh. Icon files do not display in the Site window, will not upload, and usually interrupt the transfer of an entire site. Set your image editor not to create icon files and upload all image files into a new image folder on the server. A server that goes offline or busy traffic on the network can cause problems.