Glo new Kobo with Internal SDHC 4GB

hi all,
I bought a KoboGlo few days ago, it seems to have 2GB for user files.
I want to change internal SD, so i opened it, but i found a 4 GB SDHC class 4 !!!!

I mounted it in my card reader and, using GPARTED I discover that the SD has 1,85 GB of free unpartitioned space after the FAT32 partition!

isn't a little bit strange??

I open this thread only to tell all KoboGlo owner that probably they have a 4GB SD inside their kobo.

bye!