I have been given somebody's library to catalogue and provide a search
engine for. At the moment it is in text format in column A.

The following is an example.

G:\Books\N O P\Nigel R Clough\Nigel R Clough - How To Make and Use
Mirrors.pdf

Or sometimes it appears as
G:\Books\N O P\Nigel R Clough - How To Make and Use Mirrors.pdf

So I want to move everything to the right of the last “\” into column
B and the rest into column C. So in the first example above:-

Nigel R Clough - How To Make and Use Mirrors.pdf would be in Column B
And
G:\Books\N O P\Nigel R Clough\ would be on Column C.

While in the 2nd example
Nigel R Clough - How To Make and Use Mirrors.pdf would be in Column B
And
G:\Books\N O P\ would be on Column C.

Any help in this matter would be much appreciated.