All markdown files must be inside the posts/ folder and follow the following structure:

    ├── PARENT
    │   ├──
    │   ├──
    │   ├──
    │   ├── PARENT
    │   │   ├──
    │   │   └──
    │   └──

At the root of the pages folder, there must be only GRANDPARENTs aka folders that act as bigger categories. Those are isolated allowing you to have setups likes: blog, music_reviews, recipes or guide_en, guide_el, guide_it, guide_es.

In the following screenshot, Blog is a GRANDPARENT, the active document is a in the root of GRANDPARENT, music is a PARENT and the items under it are

And the structure in file manager:

Note: PARENTs can have other PARENTs as children. SveltePress will handle them correctly.