my video file expands in nero...

[nemezyz]

they are only about 300 megabytes but when i load them they expand to like 900mb example:

i downloaded this one files its divx codec and the sound is mp3 it was like 320mb, and when i loaded the file to nero (vcd) it STAYED 320 mb

then i got this other movie that is about 300mb, but when i load it to nero and blows up to 900mb

is it the codec or type of files cuz i conveted to so MANY different files please help and thank you

[tigerman8u]

it's possible nero is re-encoding the file