I have recently get a second hand 8900. I connected it with my Laptop via USB cable and it prompt me to switch the media card>>Yes>>. I started copy paste an MP3 file 135Mb but just after start, an error appear on PC and my cell phone switched off and its RED LED permanently illuminated. I tired it switching on but not then I removed the battery and reinserted then system worked.
Can any one explain me why it happened?
I want to download files into memory card, what is the good practice?

if its still working fine dont stress about it k.