You can use your spreadsheet for as long as you want . After confirming your purchase, you will receive an email. The link on the download button is valid for 30 days . In other words, if you lose your spreadsheet, you can download it again from the email you received for up to 30 days. Therefore, we recommend that after downloading them, you save your spreadsheets in a safe place on your computer. Thank you for purchasing from us. Best regards, Planilha Ideal team.