You already have CSS Form Builder which includes the File manipulation features of digital File pro.
the only thing you are missing is Data Assist.
Using the File Upload functions of CSS Form Builder, you can already upload the file to the server, the only piece you are missing at this point is to store the file name in the database. For this you need Data Assist.
The File Manipulation features of CSS Form builder have replaced Digital File Pro, It is the same functionality, the only difference is the name and menu access point. In the documentation I pointed you to, replace any Referance of Digital File pro with CSS Form Builder File Manipulation.
you do not need the dynamic suite, unless the other extensions offered in dynamic suite interest you.