The exact size, of course, depends on the playing time (in minutes and seconds), on how good the original compresses and the compression quality. 1 Mb a minute is a good approximation, in practice. I wouldn't trust 2 Gb to hold 1000 average downloaded songs. Just go for 4.
The causes of the Vietnam War were derived from the symptoms, components and consequences of the Cold War. The causes of the Vietnam War revolve around the simple belief held by America that communism was threatening to expand all over south-east Asia.
Some of the factors that brought about the end of the cold war are as follows: The world now has entered the post Cold War era. Many efforts have been made since the 1950s to promote relaxation of tensions and on many occasions in the past it appeared that the two power blocks had entered the period of detente. Gradually, however, the Cold War came to an end. This was due to the operation of several factors acting in tandem.