Remove Last Characters from my filenames in window

Question

Im quite new to batch programming and i wanted to remove the last characters on my filename.

10_myfile_12345_6789.txt
11_myfile_12345_0987.txt

I want to remove the last 4 digits on my filename how i could do that?

I have tried this

@echo off
setlocal enabledelayedexpansion
set X=3
set FOLDER_PATH=
pushd %FOLDER_PATH%
for %%f in (*) do if %%f neq %~nx0 (
    set "filename=%%~nf"
    ren "%%f" "!filename!%%~xf"
)
popd
PAUSE

but it removes on first and last characters, i only saw this here too, im still quite confused how this works

Answer 1

With your recent clarification - I would do the following.

@echo off
setlocal enabledelayedexpansion
set FOLDER_PATH=C:\Some\Path\
for %%f in (%FOLDER_PATH%*) do if %%f neq %~nx0 (
    set "filename=%%~nf"
    ren "%%f" "!filename:~0,-4!%%~xf"
)
PAUSE

This will change your examples

10_myfile_12345_6789.txt
11_myfile_12345_0987.txt

Into

10_myfile_12345_.txt
11_myfile_12345_.txt

If you want to remove the trailing _ simply change !filename:~0,-4! to !filename:~0,-5!. This is simple string manipulation.