One Gallery is a service that connects your phone to the photos and videos in your cloud storage. The simple goal is to help you easily view your favorite memories that are saved in different places online.After installing One Gallery, you can use HTC Gallery to connect your Facebook, Dropbox, Flickr and Google Drive accounts. Your photos and videos from each connected account will appear as space-saving thumbnail images in Gallery. You can choose to download the full-size photo or video at any time. Using this feature doesn’t upload your local content to your online accounts.