I don't get how to split a RAR file, it says: Split to volumes.bytes, i don't get what im suppose to enter.

like for example i want to split the file into 300MB splits, How do i do that?

Here's a converter:

http://www.t1shopper.com/tools/calculate/byteconverter.shtml

right click on the file[s] -> add to archive

it will have "split to volume, bytes"

enter the size in bytes and hit go ~

to figure out how many bytes use google calculator

http://www.google.com/search?client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&channel=s&hl=en&q=300MB+to+bytes&btnG=Google+Search

300 megabytes = 314 572 800 bytes

Thanks guys.