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that is a lot, there is no free sites besides google drive, microsoft, amazon and other free storage s that allow you to upload 4.79 GB. Good news is that you can link them to one of them on itch.io but i dont think you can sell it nor you want to do that to sell games. However it's great for free games.
Itch can handle games up to 32 GB. However convincing them that your game is worth that much is going to be difficult.
I suppose that if your game was one the most top grossing games you'd get this no questions asked, but for a new game creator having yet another prerendered CG adult visual novel, aint gonna happen.