Microsoft tosses in free SkyDrive storage with Windows 8, but when it comes to storing work files online, businesses rely on Box. Box business accounts offer managed file access, collaboration tools, secure connections, and an uptime guarantee that consumer-grade cloud storage just can't match. And unlike SkyDrive and Dropbox, Box handles file uploads just fine.
The Windows 8 app lets you scour your Box using the Search charm, which saves a ton of time. The Share charm makes distributing files easy. Best of all, you can pin individual Box folders to your Start screen, where they turn into Live Tiles that give you a heads-up when a colleague alters a collaborative file.