The version of 1.9G is a two-disc combined version. It was deliberately pressed to1.9g. Because systems such as 5.03 and 5.50 cannot copy files larger than 2G, it can only be pressed to1.9g. 。

As for the 2.4G version, it is a pressless version, except that the same part of the two discs is removed, so it is only 2.4G. This is for PSP players with systems above 6.35, and files above 2G can be copied.

As for the split version, you have to understand that it is standard. Not much to say.