Filter to Include Folders with start with 2001

Hi all. new user.

What syntax do I use to filter a backup so it includes all sub-folders that start with a specific number ( example ‘2001’ ) and also includes everything in those folders.

I tried 'include regular expression : 2001*
but that failed as none of the files in the 2001* folders start with ‘2001’

Thanks

Update : solved.

Changed the filter setting to ‘text’ and added :
+ * / 2001 * / * . * ( without spaces )