Which activity should be used to add data to an existing .xlsx document?

The Workbook Append Range activity is specifically designed to add data to an existing .xlsx document without overwriting the existing content. This activity allows users to specify the range where data should be appended, enabling the addition of rows in a controlled manner.

It is particularly useful when dealing with existing spreadsheets that need to have new data included, as it preserves all previously stored information within the file. This capability differentiates it from other activities that may clear or overwrite existing data when writing.

In contrast, the Write Range and Excel Write Range activities are intended for writing to a specified range in a worksheet and would replace any content in that range, which is not appropriate for simply adding data to an existing file. The Data Table Append Range, while related to appending data, is context-specific and typically used in conjunction with data tables within a specific workflow structure, making it less applicable when directly handling spreadsheet documents.