The game does support the feature to Cross-Save between PS4 & PSVita. First, you need to have your PSN account set up on both devices. Next, you need to be signed into PSN (+ connected to the internet) when saving your game in a save slot (Autosave counts as well). When connected to PSN, every time you save it will upload a copy to the cloud. Lastly, you can go on a different device (also connected to PSN + the internet) and select [Load Game] through the main menu. The game should appear in the save slot that you had saved previously. Upon loading that slot, it will notify you if you need to download or resolve any conflict with the save slot.