Google wants to make sure you never have to leave its tidy suite of services and today's Gmail update goes a long way towards assuring that. Now, previews of file attachments will show up at the bottom of emails and can be expanded to full-size view just by hovering over them with the cursor. That preview state not only lets users browse multi-page documents and search for text, but also presents an option to upload directly to Google Drive, so you can access those files from the cloud on whatever device, wherever you go. The update's set to roll out "over the next week," and is desktop-only for now. But this being Google, you can expect Gmail's new preview convenience to seep into mobile sooner than later.