Complex sentence: Fotki users can organize their photos into a structure by grouping albums into folders, creating sub-folders, moving albums between folders, moving sub-folders between folders, moving and copying photos between albums.
Split into simpler sentences: Fotki users can organize their photos into a structure. This can be achieved by grouping albums into folders, creating subfolders, moving albums between folders, moving subfolders between folders, moving and copying photos between albums.