got a 160gb ipod classic and i put it on my computer and it said it was a 148.79 gb wheres my 160gb

From this Apple support document.

How much content will fit on my iPod or iPhone?

One more thing about disk capacity

In the iPod and iPhone About menu (and the iTunes Capacity bar), the disk capacity is reported as slightly less than the technical specifications for the device.

Why the difference? Most disk manufacturers measure disk capacity this way: 1 MB = 1 million bytes (1000 x 1000). A 4 GB disk, therefore, is one that holds 4 billion bytes. Computers, including Windows computers, Macintosh computers and iPod, measure disk capacity this way: 1 MB = 1 048 576 bytes (1024 x 1024). The difference in these two calculations is what causes the drive to appear as 3.7 GB on a computer, but actually be a 4 billion byte disk.

B-rock

160,000,000,000 / 1024 / 1024 / 1024 = 149.01

... is still a bit more than 148.79, but close enough for me ... 🙂

That's still quite a bit of space to work with unless you are a true music/movie buff.

😉

B-rock