The Jottacloud app works with photos and videos stored locally on your mobile device, and photos and videos stored on your Jottacloud account in the cloud. In fact the photos displayed in the Photos tab is a merged list of both local and cloud photos.
If a photo is not backed up, we display the local photo. If a photo is only stored in the cloud, we display the remote photo. If a photo is stored both locally on the device, and in the cloud, we always display the local version of the photo. This helps minimize network traffic.
We use caching and optimization techniques to ensure a great photo browsing experience regardless if the photo is stored locally or in the cloud.