RenameFileBulkPrefix -> this script rename all files in a directory if te filename contains "-" and rename te prefix.

renameBulkFiles.ps1

#Script for rename files 
$path = "C:\<directory>\"
get-childitem $path | ForEach-Object { 

    $fileName = $_.Name
    $fileExtension = $_.Extension
    $findChar = $_.Name.IndexOf("-")
        if($findChar -lt 0){
            $findChar = 0;
        } else {
            $prefixOfName = $fileName.Substring(0, $findChar)
            $newName = $prefixOfName + $fileExtension
            rename-item -path  ($path + $fileName) -NewName  $newName
            echo "name-old: " + $fileName + " name-new: " + $newName
        }


}