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Uploading the zipped file to dropbox and unzipping it inside would save a lot of time and traffic for users. Some of the web services already exist for that (like this one http://www.quora.com/Is-the...
Yes please, I use paid level of Dropbox to store quantity of files too large for my computer. (pictures) I cannot download and unzip, I need to be able to unzip within Dropbox for this to be a useful storage option for me.