The best thing about Google drive is that it lets you use 15GB free storage for a lifetime freely, while Dropbox offers only 2GB. You can extend the storage of Google drive up to 30TB but only up to 3TB in the case of Dropbox. But Google drive has a slower syncing speed and only a shared storage facility. So Google drive is better for you unless you have to deal with a limited number of files and want fast work.