I want to have the ability to attach a spreadsheet to Trello, then open the attachment and add info to the cells. I am currently a free member, not sure if I need to upgrade to business.
I'm thinking the best way to do that would be to attach a Google sheet using the attachment feature. You can do that using the "Attach a link" or the "Google Drive" option.
Trello wouldn't manage who can view the link for you, so if the Sheet contains anything sensitive, you would want to make sure it's not a public share link, and was only shared with people that you intended to view it.
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