How it folds
The sheet prints flat with the hinge grooves facing up, so every panel folds up toward the top of the print and the first layer becomes the outside. Fold the four walls up. Fold each corner flap inward so it lies against the inside of the side wall, then fold its tongue outward through the slot in the wall: the tongue is hinged by a groove on the underside, so it folds the other way. Four tongues lock four corners. Fold the lid over and tuck its flap down inside the front wall; the thumb notch lifts it.
Hinges that last
A living hinge is the few layers left under the groove. PLA takes a handful of folds (fold slowly; warm the hinge with your fingers first); PETG takes hundreds; TPU is a hinge for life, in a softer box. The presets set the groove width and what is left for each; the first layer under a hinge runs along it, which helps. Print the sheet as placed, at 0.2 mm layers, with no supports.
The name
The name is a second part in the same 3MF, two layers tall, sitting under the sheet's first layers on filament 2; Bambu Studio clips it into the sheet and changes colour twice per layer for two layers. It is placed on the lid turned so that, once the lid is folded over the back and closed, it reads left to right from the front. On the front wall it stands upright. A pattern can cover the whole first layer the same way, inset a little from every edge.
The locks
The slot in each side wall is as wide as the sheet plus the lock fit on each side, and as tall as the tongue plus the fit, centred at the tongue's height. A fit of 0.2 mm is a firm push on a well-tuned printer; use 0.3 if the tongues fight, 0.1 if they slip. The tongue sticks out past the wall by the amount you set; 2 mm is a neat ear, 4 mm a handle.
The die-line
The SVG is the same outline in millimetres: solid lines to cut, red dashes to valley-fold (toward you, the print's top side), blue dots to mountain-fold (the tongues). It cuts a card box with the same locks, the slots and all.