Space Saver is a KeepSafe Premium feature that let's you save space on your device for items stored in your Private Cloud. It reduces disk space usage by keeping the original full-resolution image in your Private Cloud and a smaller copy on your device.
When you zoom in on or unhide space-saved images, KeepSafe will quickly download the original full-resolution image as needed.
It's easy to identify which images are space-saved and which are not. Space saved items have an "S" icon displayed on their thumbnail, or at the top of the screen in the gallery viewer.
To toggle or modify Space Saver settings, you can open the Private Cloud settings and scroll to the bottom. There you can enable / disable Space Saver and see how much space you're saving.
Additionally, each Album has its own Space Saver settings, which can be accessed by the album settings screen. There you can enable / disable Space saver for that specific album and see how much space you're saving from that album.