CSV to Excel Conversion

I have one or more CSV files that I need converted into a single, well-structured Excel workbook (.xlsx). All fields must remain intact—no data dropped, altered, or re-formatted without my explicit approval. After the conversion I should be able to open the workbook in the current desktop version of Microsoft Excel and see every original column, row, and character exactly as it appears in the source file.

Deliverable: one Excel file that mirrors the source data.

Send back the completed workbook and a brief note confirming the row and column counts so I can verify everything imported correctly.