Binh, these new AK202x have a slightly different firmware structure and the existing player utilities don't seem to work on them. There's been an AK2025 firmware, supposedly compatible with these new ones, which has been posted, but it's encrypted and they changed the encryption algorithm so that the older product tools etc. won't work with it.
Open it up and read the part# of the NAND flash. I'm guessing it's a K9GAG08U0M or similar 2GB chip like the other AK202x with fake memory here. The recommended procedure is to create a (slightly less than, to accommodate the firmware) 2GB partition on the device and use that.
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