OneSync
OneSync is a free sync tool that maximizes lightweight synchronization experience and provides both offline synchornization through thumb drive and online synchronization through Dropbox. Light-weight basically means that for each sync process, only modified and newly created files are copied over and stored in the intermediate storage. So, if an user has a folder of 10GB, after the first round of sync, because of the Light-weight Sync, only the files that he or she modifies will be copied over to the intermediate storage. Hence, as long as the user only modifies or creates files which have total file size that is less than 2GB, he or she will be able to sync the 10GB folder through the Dropbox.
