When you select the import operation in the Graphics Import Export Wizard, you are offered an opportunity to make backup copies of the files that will be overwritten when the selected files are imported. By default, Yes is selected.
Backup copies of graphic displays are stored as .gfx files.
Choose Yes to create backup copies of the selected files. When you click Next, the Backup Folder dialog opens.
Choose No to overwrite the files in the application with the files being imported. When you click Next, the Import File Type dialog opens.