If you live in an extremely wet, high humidity environment, it isn't a good idea to store fabric in plastic. If pressing with wet steam before storing, I would let it dry completely first, before placing it in the plastic tote.
But barring those exceptions, it's certainly preferable to store in plastic in a controlled climate, than placing in cardboard boxes. Anyone who's ever placed items in storage in cardboard boxes for a time, knows what happens to cardboard over time. Not a good idea to let that come in contact with fabric