Regular Expression Needed, Please

[stevehero]

@ragtag

...is the album-directory/folder already correctly named (e.g. My Album Vol. 001^100 up to My Album Vol. 100^100), but how do I transfer that to the album field, using a regular expression?
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Please have a read of the FAQs. (HERE) Particularly this section. (HERE)

Begin Action Group _Script Test#TEST

Action #1 Actiontype 5: Format value Field ______: TITLE Formatstring: %_directory%

End Action Group _Script Test#TEST (1 Action)