A Quick Tour of the Windows 8.1 Metro Photo App
If you have any files inside the Pictures Library on SkyDrive, tap or click the Pictures folder.
The contents of that folder and any other folders inside it appear inside the SkyDrive list.
The little clocks you see in the lower-right corner of the pictures indicate that the file isn’t on your computer — at least, not yet. SkyDrive has pulled down a thumbnail, not the whole file.
If you have any, double-click to open sub-folders to reveal more folders within — ad infinitum.