Hello,
I'm going to try to explain the problems I had with the 01.09.0007 firmware
as well as the way to FIX the problem.
I'm using a C280 2GB player.
When I first upgraded to the 0007 firmware, my memory went from 1.91GB to 1.18GB. I tried everything to fix it (formating, erasing the partition, downgrading to an older firmware, etc.) and nothing worked. After some research and some posts on this forum, member David15 found a program that fixes the problem!
You can download here :
ftp://211.147.250.117/teclast/mp3/Fixtool.rar
The program is in chinese but its easy to figure out.
Make sure you put the player in update mode and connect the USB cable before running the program or it wont work.
After you run it, disconnect USB cable and turn off player.
Then, connect USB and allow player to power up.
Then, run Firmwareupdate program and re-install firmware as usual.
I installed the 0007 firmware again and this time it did not eat up any of my memory.
Hope this helps.