I don't have a PayPal account, so I couldn't really try out the integration. Do the files remain in Dropbox/Drive, or do they get copied to Sellbox's storage?

I don't have a PayPal account, so I couldn't really try out the integration. Do the files remain in Dropbox/Drive, or do they get copied to Sellbox's storage? This might be a good candidate for the Dropbox Chooser: https://www.dropbox.com/developers/dropins/chooser/js https://www.dropbox.com/developers/dropins/chooser/js, which gives nice UI for picking files and then only grants the app access to those specific files. (I work at Dropbox and am happy to answer questions. Email: smarx@dropbox.com)