Hey there, Samantha.
I see no reason for you not to be able to upgrade it with a SATA SSD. However, if your laptop is using SATA II instead of SATA III, the SSD should still work properly, but it will be bottlenecked a bit by the older SATA interface. Don't get me wrong though, you'd still see a great performance boost even if this is the case.
I'd recommend that you get in touch with the laptop manufacturer's customer support and ask if they have any recommendations for maximum drives size or models, so that you rule out any incompatibility issues.
Hope that helps.
Boogieman_WD