[kacir]

Originally Posted by Tweetygirl10111

I tried using the save to disk option and editing the template using the lookup name I created which was just series_title but it didn't seem to work.

Here is what I use. It creates directories for series and prefixes the name of the directory with the book with a series number
This is not what you asked for ;-) but shows an example of advanced syntax of template language.

{author_sort:.1}/{authors}/{series:|# |}/{series_index:0>3s|| - }{title} - {authors}/{series_index:0>3s|| - }{title} - {authors}

To create something like you want you might want to use

{authors} - {series:|| }{series_index:0>3s|| - }{title}

No custom columns needed.

Please notice this {series_index:0>3s|| - }
series_index - is series index
:0>3s - the number is three characters long, so instead of part 2 it will write 002 - so the series can be alphabetically sorted when there is more than 10 books in series. Otherwise it would be like this: 1,10,11,2,3,...,9
|| - - if you did not use this, but instead {authors} - {series} {series_index} - {title} then when there is no series you would have filename such as: 'Author Name - - Title'. the || denominate prefix and suffix that is given to the series or series index IF they exist.
For the angle brackets version it would be something like

{authors} - {series:|[| }{series_index:0>3s||] - }{title}

Do not hesitate to ask for more details. Calibre is extremely powerful tool that has even more advanced features