The following VBA code can help you quickly split multiple worksheets of current workbook to separate Excel files, please do as follows:

1. Create a new folder for the workbook that you want to split, because the split Excel files will be stayed at the same folder as this master workbook.

2. Hold down the ALT + F11 keys in Excel, and it opens the Microsoft Visual Basic for Applications window.

3. Click Insert > Module, and paste the following code in the Module Window.

VBA: Split a workbook into multiple workbooks and save in the same folder

Sub Splitbook()
'Updateby20140612
Dim xPath As String
xPath = Application.ActiveWorkbook.Path
Application.ScreenUpdating = False
Application.DisplayAlerts = False
For Each xWs In ThisWorkbook.Sheets
    xWs.Copy
    Application.ActiveWorkbook.SaveAs Filename:=xPath & "\" & xWs.Name & ".xlsx"
    Application.ActiveWorkbook.Close False
Next
Application.DisplayAlerts = True
Application.ScreenUpdating = True
End Sub

4. Click F5 to run the code

(Above info is copied from here >> external link)