I fully agree with guys who told you that none will write the code for you, but you are lucky that I have that already written and there may be other people looking for same info, so here it is.
Put the code to module in your master workbook and replace some data as commented:
Option Explicit
Sub GoThroughFilesAndCopyData()
Dim BrowseFolder As String
Dim FileItem As Object
Dim oFolder As Object
Dim FSO As Object
Dim shtWork As Worksheet
Dim lngRow As Long
Dim i As Long: i = 1
Dim strPath As String
Dim MasterSheet As Worksheet
Dim ChildSheet As Worksheet
Application.ScreenUpdating = False
' selecting the folder to look files in
With Application.FileDialog(msoFileDialogFolderPicker)
.Title = "Select the folder with child workbooks"
.Show
On Error Resume Next
Err.Clear
BrowseFolder = .SelectedItems(1)
If Err.Number <> 0 Then
MsgBox "You didn't select anything!"
Application.ScreenUpdating = True
Exit Sub
End If
On Error GoTo 0
End With
Set FSO = CreateObject("Scripting.FileSystemObject") ' creating filesystem object
Set oFolder = FSO.getfolder(BrowseFolder) ' creating folder object
Set MasterSheet = ThisWorkbook.Sheets("masterworksheet_name") 'replace masterworksheet_name with the name of your worksheet in master workbook
For Each FileItem In oFolder.Files 'looking through each file
If UCase(FileItem.Name) Like "*.XLS*" Then 'try open only excel files
i = MasterSheet.Cells(Rows.Count, 1).End(xlUp).row + 1 ' find last not empty row and get a next one which is empty
Workbooks.Open (BrowseFolder & Application.PathSeparator & FileItem.Name)
Set ChildSheet = Workbooks(FileItem.Name).Sheets("worksheet_name") 'worksheet_name - replace with child sheet name
With ChildSheet ' replace your_range_to_copy with the range on a child sheet you want to copy
Range("your_range_to_copy").Copy Destination:=MasterSheet.Cells(i, column_number) 'i - is the number of last empty row, replace column_number - must be the column number of range to insert
.Parent.Close SaveChanges:=False 'close child workbook without saving
End With
End If
Next
Application.ScreenUpdating = True
End Sub
solved How to copy specific range cells from multiple sheets to one sheet?