I3 must be the current version 58. Earlier software versions did not have a save to card function. The cost is about $150.00 for the upgrade. If this seems a little high, you can tell them that there are many other desireable features added as well. Here are some of them:
1. Allows saving backing sequences as standard midi files.
2. Keyboard 1 and 2 can now be assigned to seperate midi channels.
3. Cool new velocity curves
4. Tempo lock function will work between arrangements instead of only inside one arrangement.
5. Transpose lock works in the same way.

To view the software version. Hold down the edit style button while turning it on.