The IPod's 40GB hard drive lets you fit about 10 thousand 160-kbps MP3 files into a package. The IPod also works as a portable Mac hard drive; with it, you can carry not just your whole music collection in a coat pocket but also most of your critical files, if you like. The IPod's 2-inch LCD screen displays tons of information. When music is playing, you can read

One drawback with the iPod is it’s badly designed or operated battery. The iPod, by Apple, can cost anywhere from 250 to 400 dollars, but now some users are finding that replacing the battery is so expensive, it's not worth the extra money. If you could get your hands on one, it was the hottest Christmas gift of the season, but the batteries are dying a lot faster than people thought and it's now getting them replaced is neither easy or cheap.

Rio users describe the KARMA as storage that is a cross between a hard disk and flash storage. The $299 player is about the size of a credit card, and one-half inch thick, at the bottom so it fits easily into a pocket. However, some users say Rio also designed the Karma as an iPod killer, it's smaller, lighter, and optimized for Windows. What's more, it supports MP3, WMA, and Ogg Vorbis compression technologies. Ogg Vorbis is a completely open, patent-free, professional audio encoding and streaming technology with all the benefits of Open Source.

The Rio Karma, a 20-GB, USB 2

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