Talk to your local Sage consultant, it's not a simple process.

Your local Sage 300 Consultant won't know about the differences.   There are maybe a dozen folks left that know both sides I would recommend your local consutlants seek out one of them.   You need both.

There are conversion utilities that go up to version 12 but you can get to twelve and then move up to the current 300 version.   Sage no longer distributes these conversion utilities but they are around.  We've used them a half dozen times.