copy a folder- and all subfolders - without overwriting existing

Question

0

I am trying to create a backup database on a network drive using fso.folder copy. My intention is to move all files and subfolder within the folder, but if a file already exists on the backup drive, skip it, and copy the remainder of the files in the folder.

FSO.copyfolder Source:=Sourcefilename, Destination:=Destinfilename, OverwriteFiles:= False

However, the script errors when it finds the existing file. Any advice would be appreciated.

Answer 1

Please, try the next code:

Sub testCopyFolder()
 Dim FSO As Object, SourceFold As String, DestinationFold As String
 
 SourceFold = "Source folder path"           ' ending in "\"
 DestinationFold = "Destination folder path" ' ending in "\"
 Set FSO = CreateObject("Scripting.FileSystemObject")
 
 If Not FSO.FolderExists(DestinationFold) Then
    FSO.CopyFolder SourceFold, DestinationFold
 End If
End Sub

You can proceed in a similar way in order to copy files. Of course, using FSO.FileExists()...

Answer 2

Backup Folder and Its Subfolders Without Overwriting

• The following will backup a Source Folder to a Destination Folder i.e. copy missing folders and files.
• TESTcopyFolder is just an example how you could use the solution.
• It will call the initializing procedure, backupFolder, which will call backupFolderCopy and backupFolderRecurse when necessary.
• The declaration Private SkipPath As String and the three procedures have to be copied to the same (usually standard) module, e.g. Module1.

The Code

Option Explicit

Private SkipPath As String

Sub TESTcopyFolder()
     
    Const srcPath As String = "F:\Test\2020\65412587\Test1"
    Const dstPath As String = "F:\Test\2020\65412587\Test2"
     
    backupFolder srcPath, dstPath
    
    ' Open Destination Path in File Explorer.
    'ThisWorkbook.FollowHyperlink dstPath

End Sub

' Initialize
Sub backupFolder( _
    ByVal srcPath As String, _
    ByVal dstPath As String, _
    Optional ByVal backupSubFolders As Boolean = True)
    
    Dim fso As Object: Set fso = CreateObject("Scripting.FileSystemObject")
    
    With fso
        If .FolderExists(srcPath) Then
            backupFolderCopy fso, srcPath, dstPath
            If backupSubFolders Then
                SkipPath = ""
                backupFolderRecurse fso, srcPath, dstPath
            End If
            MsgBox "Backup updated.", vbInformation, "Success"
        Else
            MsgBox "Source Folder does not exist.", vbCritical, "No Source"
        End If
    End With

End Sub

' Copy Folders
Private Function backupFolderCopy( _
    fso As Object, _
    ByVal srcPath As String, _
    ByVal dstPath As String) _
As String
    
    With fso
        If .FolderExists(dstPath) Then
            Dim fsoFile As Object
            Dim dstFilePath As String
            For Each fsoFile In .GetFolder(srcPath).Files
                dstFilePath = .BuildPath(dstPath, fsoFile.Name)
                ' Or:
                'dstFilePath = Replace(fsoFile.Path, srcPath, dstPath)
                If Not .FileExists(dstFilePath) Then
                    .CopyFile fsoFile.Path, dstFilePath
                End If
            Next fsoFile
            'backupFolderCopy = "" ' redundant: it is "" by default.
        Else
            .CopyFolder srcPath, dstPath
            backupFolderCopy = srcPath
        End If
    End With

End Function

' Copy SubFolders
Private Sub backupFolderRecurse( _
        fso As Object, _
        ByVal srcPath As String, _
        ByVal dstPath As String)
    
    Dim fsoFolder As Object: Set fsoFolder = fso.GetFolder(srcPath)
    
    Dim fsoSubFolder As Object
    Dim srcNew As String
    Dim dstNew As String
    
    For Each fsoSubFolder In fsoFolder.SubFolders
        srcNew = fsoSubFolder.Path
        dstNew = fso.BuildPath(dstPath, fsoSubFolder.Name)
        ' Or:
        'dstNew = Replace(srcNew, srcPath, dstPath)
        If Len(SkipPath) = 0 Or Left(srcNew, Len(SkipPath)) <> SkipPath Then
            SkipPath = backupFolderCopy(fso, srcNew, dstNew)
            backupFolderRecurse fso, srcNew, dstNew
        End If
    Next

End Sub