How to load only 1 CSV file By modify the script ?

Hi All

I have load 4 CSV file to sharepoint folder. The script as below :-

let
Source = SharePoint.Files("https://isdnholdings.sharepoint.com/sites/FTGL/", [ApiVersion = 15]),
#"Filtered Hidden Files1" = Table.SelectRows(Source, each [Attributes]?[Hidden]? <> true),
#"Invoke Custom Function1" = Table.AddColumn(#"Filtered Hidden Files1", "Transform File", each #"Transform File"([Content])),
#"Renamed Columns1" = Table.RenameColumns(#"Invoke Custom Function1", {"Name", "Source.Name"}),
#"Removed Other Columns1" = Table.SelectColumns(#"Renamed Columns1", {"Source.Name", "Transform File"}),
#"Expanded Table Column1" = Table.ExpandTableColumn(#"Removed Other Columns1", "Transform File", Table.ColumnNames(#"Transform File"(#"Sample File"))),
#"Changed Type" = Table.TransformColumnTypes(#"Expanded Table Column1",{{"Source.Name", type text}, {"GL Code", Int64.Type}, {"GL Description", type text}, {"Type", type text}, {"Month", Int64.Type}, {"Year", Int64.Type}, {"Posting Date", type date}, {"AccCur", type any}, {"AccConvRate", Int64.Type}, {"C/D", type number}, {"CurrencyValue", Int64.Type}, {"Reporting Code", Int64.Type}, {"Date", type date}})
in
#"Changed Type"

My question is , how to modify the above script , so that it will only load 1 CSV file instead now load 4 CSV file.

The reasons is , i try to create sample PBI file , so that it can load faster , until i tested okay , then i load all raw data file. My actual raw data file have more then 100.

Paul Yeo