can readycache software be used with other larger SSDs?

I am wondering if I already have a Sandisk 64GB SSD, can I use the readychache software with that drive?

In other words, am I forced to only use the 32GB that comes in the box I buy the readycahce product?

the expresscache software will only work with the readycache ssd. it will not work with any other SSD.