No you cannot if the quantity of storage is limited. That is why the storage cost algorithm is dynamic and the cost of storing data depends on the amount of storage currently available. And storage is added when more farmers come online. One coin does not buy a set amount of storage but rather the amount is determined by the algorithm and when you use up your balance that the coin bought.
In other words even without divisibility the coin is divided by the storage algorithm and storage subsystem. So you spend one coin and the network gives you a “PUT” balance. “PUT” is the term used for storing one block/chunk. And when you store a block/chunk the network reduces your “PUT” balance by the current price for storage. One coin usually will go a long long way when storing.
The reason we need divisibility is not for the farming/storing of data, but because (we hope) the price of a coin will be going higher as time goes on and the only way to do micropayments to/from other people will be divisibility.