A thing behaving within the parameters of its nature, in response to external influences, is part of what maintains it being _x_ thing. While it therefore can't be totally unpredictable, it can still be selecting from those choices which its own system allows. Access to total "freedom" would destroy what it is. I'd love to leave it in that small suitcase, but unfortunately any clarification requires an attempt to unpack it below ...
"Free" doesn't really add anything to "will" (unless it's an absolute definition of free). We can view will as being about having options and the ability to care about them and choose one and exercise it. The "freedom" is already there in the limited "room" of choices which volition entails. For instance, a rock lacks will (among other items) and gets swept away by a flood; whereas a human may decide to remove itself from the path of the flood. The presence of complex causes in the human and the long history of causes (evolution, etc) which engendered them is what provides the volition rather than negating it. The rock lacks that mechanism and deep history.
What about block-universe determinism? As an analogy: Even in a movie where the events are set (they never vary each time the film is played), the human characters still demonstrate a will which leaves floating down a river do not exhibit. IOW, the determinism of the movie does not eliminate that distinction. Again, this needs to be unpacked further...
Let's return to the issue of the adjective that is popularly attached to "will" (i.e., "free"). To avoid being redundant, the version of "free" which people try to apply to "will" is apparently of the absolute or unlimited ilk. Since, again, "free" in the mitigated sense of just having ANY options (like die or don't die), is already part of volition's necessary equipment. Here's an example of the former, in that the doors are wide open, no cut-off measurement is supplied:
free -
immune from obligation or duty; unregulated; not restricted by principles or scheme.
But such complete freedom is impossible (at least for a natural entity). A thing is unavoidably going to be confined to the boundaries of its identity: What makes it distinguishable from other entities / affairs. Even if a thing exhibits modifications over time, those changes will still be determined within the borders of its identity (properties, characteristics, tendencies, etc of _x_ thing): What its identity allows. If a thing was completely or absolutely "free" it would exceed its form -- its structure and operation (if applicable). Thus no longer classifiable as goat, lake, storm, turtle, planet, etc. A pig that flies of its own power is no longer a conventional pig, it transitions to another category, a different identity.
A universe and a human have different identities, just as a kitchen sink and the house it occupies are distinguishable. The cosmos "proceeds" as a cosmos does according to its nature (or according to its specific type if authorities claim there is a whole varying set of them). A human proceeds according to its limited possibilities or those of a particular person.
To be something that possesses volition involves being bound to or constituted of an organization / system that can yield decisions, choices, and determinations. As opposed to a rock which can't act on its own or a situation of random disorder, arbitrary changes, anarchy, etc.
A thing that has will does not qualify as being free in an absolute context because having volition in the first place means being restricted to the parameters of an organization / system which enables will (that source in turn being part of the properties of the overall identity of the thing, which is accordingly its greater "prison").
However, to make a decision requires beforehand that there are options available to choose from. So that which enables volition allows some degree of "room" for variables. It's just not absolute "freedom", it couldn't be the latter without the thing losing its status as a thing with will or possibly ceasing to exist completely as _x_ (its overall identity). Thus, volition already embraces "free" as long as it is one of the very mitigated or compromised definitions of the word.
In the case of a human faced with merely two choices (like "You must reveal the secret password or die!"), she's still making a decision which a rock or a cloud of atmospheric dust could not do. Declaring that it's not really a free choice (on the grounds that she will predictably decide to live) doesn't negate that she is making a choice within the mitigated freedom or "room" which the boundaries of her identity allow. The restrictions which make her distinct as a human organism to begin with, which enable "will" to begin with. She is not random molecules; she has a specific nature / form and the decision she outputs is in accordance with her nature.
So it's enough to be a creature with plain "will", since having unlimited choices would make the stable existence of a human impossible, anyway.