Option Explicit
Public Sub SaveAsCSV1()
Dim wb As Workbook, ws As Worksheet, plage As Range
Dim strPath As String, strFilename As String
Dim f As Integer, L As Integer, chaine As String, c As Integer
Set wb = ThisWorkbook
Set ws = wb.Worksheets("Biobank_M0")
strPath = wb.Path & Application.PathSeparator
strFilename = strPath & "/" & "Biobank_M0.csv"
With ws
Set plage = .UsedRange
f = FreeFile()
Open strFilename For Output As #f
For L = 1 To plage.Rows.Count
chaine = plage.Cells(L, 1)
For c = 2 To plage.Columns.Count
chaine = chaine & ";" & plage.Cells(L, c)
Next c
Print #f, chaine...