I can’t upload Mac "packages" into my Online Storage.
We are sorry, but Mac "packages" (files having the extension .pkg, .app, .download, .apvault, etc.) cannot be uploaded into your Inbox.com Online Storage.
If you want to upload these types of files into your Online Storage, archive/compress the package with your favorite compression utility (such as gzip, Stuffit etc.), or just right-click the package and select Archive/Compress from the menu, and then upload the archive file.