Dropbox is a cloud storage service provided by Dropbox inc. It allows you to backup photos, videos and important files to access them from anywhere. It has a 'LAN Sync' feature, which allows you to speed syncing dramatically when the file exists on your LAN i.e. Local Area Network'. You need to download and install 'Dropbox Desktop Application' on your computer. It creates a folder on your systems hard disk. The folder is named 'Dropbox'. whenever you add photos, videos and files to your Dropbox folder, the files are then synced with Dropbox servers. When Dropbox determines the change has been made to the file, it initiate the syncing process. All shared folders and linked computers will then download any new version of the file. With LAN syncing, it will look for the new file on your Local Area Network, and bypass the need to download the file from Dropbox servers, so it will speed up the syncing process.