How to remove all text from right after certain characters in excel

Question

Sorry I\'m a noob in excel and need help with this. Say I have the following text in my excel.

1. D:/folder A/ folder B.1/text_01.txt
2. D:/folder A/Folder C/

Answer 1

If you don't mind a bit of vba, then InStrRev was almost tailor made for cases like these:

Public Function Remove_After(ByVal what As String, ByVal where As Range) As String
    Remove_After = Left(where, InStrRev(where, what) - 1)
End Function