MyMPx.org - Issues with Nano look a like Chipod

Hello
Somedays back I got my second MP4 (nano look a like) player from China through one of my friend and previous one worked very well and also had 8GB memory and I was able to play all my video,songs and photos on it. This one also is working fine but only till 7 some songs and I have formatted it almost 20+ times using GUI based command as well as DOS command.In DOS mode it showed 8137 MB of space.When I tried formatting it with FAT format it gave error that FAT 16/12 does not support as volume is large.then I formatted it with FAT32 and it got formatted fine.When connected to notebookit is showing 2 drives with 7.99 GB and other very small capacity.I also loaded it with 6 GB of data and when retrieved it on my notebook, data remained same and also all files were working fine in my notebook.If I load an AMV file with 400MB + size and play the file in player the file is running perfectly .But problem comes when I load some more files with,it will play first AMV file but then for other file it will show 00:00:00 and gives format error.Also for songs it will play first 7 songs and then it will restart again automatically.Could u plz tell me whether this has got Memory size of 8GB or less and if I connect it to my notebook again and try playing the songs then only first 7 songs are working and other songs are not working on my notebook and message says that they are corrupted and they appear ‘n’ number of times I connect it to my notebook .Could anyone help me in finding the issue with this player.I don’t mind using this as a storage device cz I got this for the price less than 8GB USB drive.

Thanks in advance.

best regards
SKA