I've bought an unbranded mp3 player with 512mb which has FM radio also, on Ebay.co.in. I've tried upgrading firmware. Initially, When I connected for first time to PC I was prompted to put USB mass storage device CD, it said AdfuUd.sys and MSI.CAB cannot be found. The CD along with the player is useless. I had created 5 folder with MP3 songs in the Windows Explorer and dragged and dropped in the Removable Disk. Having done that, the Music menu on the player showed some garbled language (not Chinese) and then now it states only as 'starting'. Now I have given it in a shop to reformat which costs Rupees.500
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All users read the message posted by
mikeeeee 
For Mumbai consumers, There are no. of shops in Heera-Panna formatting the device