[Source Table].Filter([Archived?].Not()).Slice(1, 400).FormulaMap(WithName(CurrentValue, ImportRow,
RunActions(
ImportRow.ModifyRows([Archived Content], Row._Merge().ToText()),
[Archive Source Table].AddOrModifyRows(
CurrentValue.[Row Id] = ImportRow.[Row Id],
[Row Contents], ImportRow.Row._Merge().ToText()
)
)))