Learn how to use Dropbox Selective Sync to save space on your computer’s hard drive. This video explains how Dropbox syncing works and how to use it. Find out how to create space by deleting or using Dropbox Selective Sync. The video is less than eight minutes long and can be used by PCs or Macs with the Dropbox app installed. Narrated by the author of Dropbox In 30 Minutes.