with open('data.csv', 'wb') as csvfile:
fieldnames = ['File_Path', 'File_Size(MB)', 'Last_Edit', 'MXD_Version', 'Author', 'PageSize',
              'XMAX', 'XMIN', 'YMAX', 'YMIN', 'DATASOURCE'] #all the header fields
writer = csv.DictWriter(csvfile, fieldnames = fieldnames)
writer.writeheader()
for mapDocument in findFiles(r"W:/GIS (no purge)", '*.mxd'):
    print mapDocument
    st = os.stat(mapDocument)
    print "Using ArcPY Mods..."
    mxd = arcpy.mapping.MapDocument(mapDocument) #using arcpy to gather more information
    print "Reading Map Document..."
    writer.writerow({'File_Path' : str(mapDocument),
                     'File_Size(MB)' : str(((st[ST_SIZE])/1024.0)/1024.0),
                     'Last_Edit' : str(time.ctime(st[ST_MTIME])),
                     'MXD_Version' : getMXDVersion(mapDocument)})

    print "Searching Layers and Writing..."
    for layer in arcpy.mapping.ListLayers(mxd):
        print "boop"
        if layer.supports("DATASOURCE"):
            writer.writerow({'DATASOURCE' : layer.dataSource})
        else:
            break
    del mxd

for lyr in lyrList:
            dType = "UNK"
            dName = "UNK"
            dPath = "UNK"
            if lyr.supports("dataSource"):
                if lyr.supports("workspacePath"):
                    dPath = lyr.workspacePath
                if lyr.supports("datasetName"):
                    dName = lyr.datasetName
                try:
                    dType = arcpy.Describe(lyr.dataSource).datasettype
                except:
                    dType = "Possible broken link"
            else:
                if lyr.isGroupLayer:
                    dType = "Group Layer"
                if lyr.supports("SERVICEPROPERTIES"):
                    arcpy.AddMessage('Found map survice')
                    dType = lyr.serviceProperties["ServiceType"]