How much is five mega bites? Like for wireless internet usage.

Are you asking for computer percentage usuage? Depends how much you have on your system. I have 80GB on my memory. 5 mb is nothing. Feel safe to download. It won't take up of your system.

If you are asking about file size, see above.

However, if you're asking about the quoted speed for your wireless internet - i.e. 5 mbps (5 Mega Bits Per Second) that's a pretty fast speed, the average internet speed advertised now is around 8 mbps.

If you're downloading loads of stuff, then it matters, if you're just looking at regular web pages I wouldn't worry about it that much.