Importing .wavs on a Roland JX-305?

Hello, you may remember me from before when I asked about .wav importing on a Korg iX300, and since you cant import wav files, I didnt get that keyboard. But now Im looking to possibly get a Roland JX-305 Groovesynth. I noticed that you can get "Smart Media Cards" for them... and I cant help but ask, is this so you can import .wav files?

This time it is not as severe though, if I can import .wavs, thats a plus, if I cant, then I'll just save up for a sampler.

Thank you in advance,
-Daniel