Workbooks are subject to limits on the amount of attachments and images they can contain based on your current Spreadsheet.com plan. The limits are:
|100 MB||2 GB||50 GB||Unlimited|
Individual attachments are each limited to a maximum file size of 20 MB. Cells can contain an unlimited number of attached files, but the maximum number of files that can be attached at one time is 5.
For more information on workbook and worksheet limits, please see our article on Workbook Storage and Size Limits. Or take a look at our article About Spreadsheet.com Plans to learn more about upgrading.