Despite the ubiquity of mobile devices, Internet coverage isn’t so. In addition to not having a cellular data plan, or public transportation with no Wi-Fi access there are also places where radio waves just can’t reach, like tunnels. In these cases, cloud storage is rendered helpless and offline access becomes a matter of life or death (for your work). Dropbox, one of the biggest names in that space, has long taken heed of that by allowing individual files to be taken offline. Now it is taking one step further by making whole folders available offline as well.