Once a file has been attached to your workbook, you can rename the file from within the Attachments preview dialog.
The Attachment data type is a unique feature to Spreadsheet.com that lets you add files directly to cells in your worksheet. Attachments are great for sharing relevant files. For example, you can attach candidate resumes on your Hiring worksheet, screenshots of errors in your new app's Bug Tracker, or creative drafts in your marketing planning workbook. Once you have added an attachment, in addition to other changes, you can rename it.
How to Rename an Attachment File
Click the three-dot icon that appears when you hover over an attachment cell to open the Attachments preview dialog.
Once in the Attachments preview dialog, click the Edit file name button to specify a new file name for your attachment.
Changes to the file name will be reflected in Spreadsheet.com and when other users download your attachment to their device.