\s*any whitespace character, repeated any number of times
Non-Capturing Group(?:[cC]:[/\\])? ?repeats the group contents below at most once:
cthe literal c (9910 / 1438 / 6316) (case sensitive)
Cthe literal C (6710 / 1038 / 4316) (case sensitive)
:the literal : (5810 / 728 / 3A16)
/the literal / (4710 / 578 / 2F16)
\\the literal \ (9210 / 1348 / 5C16)
Non-Capturing Group(?:\w+[/\\])* *repeats the group contents below any number of times:
\w+any word character, repeated at least once
/the literal / (4710 / 578 / 2F16)
\\the literal \ (9210 / 1348 / 5C16)
\w+any word character, repeated at least once
\.the literal . (4610 / 568 / 2E16)
+matches at least one character from the set below:
a-zone character from a (9710) to z (12210) (case sensitive)
g modifier: global. Finds all matches instead of stopping after the first