Need a script to update keywords for 20000 images in Bridge

shashi88, are you on Mac or Windows OS?

The basic ExifTool commands are the same, however there are some minor formatting differences required in some cases, such as the Mac uses 'single quotes' to wrap around a file path and file name that contains word spaces, while on Windows, "double quotes" are used (they are not really quotes, they are inch and foot marks, straight not curly).

P.S. Are the images all in a single directory, or are they contained in a main parent/top-level folder and then within subsequent second-level, third-level etc nested folders?

Do you need to apply the keywords to a single specific file type, multiple file types or do you need to exclude specific file types?

Finally, are there existing keywords to be overwritten or do you wish to append?

The filename should be in the first column I.E. filename.jpg and the file should exist in the selected folder or a sub folder if the relevant checkbox is ticked.