Dell latitude E5270 you

Good night. I have a Dell latitude E 5270 i5 6300 vio, 8 gb Ram.  I have a M.2 of 128 gb but I would like to know if I can add another SSD or HDD to my laptop. Because I would like to have more storage space. I have heard that I only can have one SSD.  Can I Have 2 SSD?? Thanks for your attention.