Lisa get a new Dell computer with a 256GB SSD and a 2TB hard drive. Lately, it's been slowing down and she discovered that all the data has been written to the SSD and not the hard drive. Leo says that Lisa should make her spinning drive the "D" drive and then direct Windows to put all her data onto that D drive. She can move all her data over to it and then remove it from her C drive.
She'll need to right-click on my documents, click on "properties," then "location," then tell Windows where she wants the data to go. In this case, that will be the "D" drive.
She'll also want to be sure that "Trim" is enabled on her SSD. Here's an article on how to do that.