If you want to get the names of all the files stored in a folder and excluding the files stored in a sub folder.Try below code-

Option Explicit
Sub file_names_in_folder_without_including_files_in_subfolder()
Application.ScreenUpdating = False
Application.DisplayAlerts = False
Dim fldpath
Dim fld As Object, fil As Object, fso As Object, j As Long
    With Application.FileDialog(msoFileDialogFolderPicker)
    .Title = "Choose the folder"
    .Show
    End With
    On Error Resume Next
    fldpath = Application.FileDialog(msoFileDialogFolderPicker).SelectedItems(1) & "\"
    If fldpath = False Then
        MsgBox "Folder Not Selected"
    Else
    Workbooks.Add
    Cells(1, 1).Value = fldpath
    Cells(3, 1).Value = "Path"
    Cells(3, 2).Value = "Dir"
    Cells(3, 3).Value = "Name"
    Cells(3, 4).Value = "Size"
    Cells(3, 5).Value = "Type"
    Cells(3, 6).Value = "Date Created"
    Cells(3, 7).Value = "Date Last Access"
    Cells(3, 8).Value = "Date Last Modified"
    j = 4
    Set fso = CreateObject("scripting.filesystemobject")
    Set fld = fso.getfolder(fldpath)
    For Each fil In fld.Files
        Cells(j, 1).Value = fil.Path
        Cells(j, 2).Value = Left(fil.Path, InStrRev(fil.Path, "\"))
        Cells(j, 3).Value = fil.Name
        Cells(j, 4).Value = fil.Size
        Cells(j, 5).Value = fil.Type
        Cells(j, 6).Value = fil.DateCreated
        Cells(j, 7).Value = fil.DateLastAccessed
        Cells(j, 8).Value = fil.DateLastModified
        j = j + 1
    Next
    End If
    Range("a1").Font.Size = 9
    ActiveWindow.DisplayGridlines = False
    Range("a4:h" & Range("a4").End(xlDown).Row).Font.Size = 9
    Range("a3:h3").Interior.Color = vbCyan
    Columns("c:h").AutoFit
Application.ScreenUpdating = True
Application.DisplayAlerts = True
End Sub