I definitely recommend something small, that can be powered by the USB cable so you don't have to fool with a separate power cord.
In terms of storage size, I've got over 3000 songs on my computer and that's about 20 GB of data, so even the tiniest external hard drive should hold that. There are flash drives that can easily hold that much as well, but GB-for-GB they're more expensive--there's a price vs. size tradeoff and it's up to you which is more important.
If you're trying not to spend too much, you might think you should just buy the cheapest external hard drive, but a 320 GB model might only be ten dollars more than a 250 GB one from the same manufacturer. It's kind of like checking the price-per-gallon of milk--you have to do some math to find the best value.
To pick out something like this I'd go to newegg.com. They have a wide assortment of external hard drives, and a lot of options for filtering your search by the manufacturer, storage capacity, price, and so on. They also provide out-of-the-box pictures of most products, which I find helpful. Even if you end up driving to Best Buy, it can be useful to window-shop at Newegg first.
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In terms of storage size, I've got over 3000 songs on my computer and that's about 20 GB of data, so even the tiniest external hard drive should hold that. There are flash drives that can easily hold that much as well, but GB-for-GB they're more expensive--there's a price vs. size tradeoff and it's up to you which is more important.
If you're trying not to spend too much, you might think you should just buy the cheapest external hard drive, but a 320 GB model might only be ten dollars more than a 250 GB one from the same manufacturer. It's kind of like checking the price-per-gallon of milk--you have to do some math to find the best value.
To pick out something like this I'd go to newegg.com. They have a wide assortment of external hard drives, and a lot of options for filtering your search by the manufacturer, storage capacity, price, and so on. They also provide out-of-the-box pictures of most products, which I find helpful. Even if you end up driving to Best Buy, it can be useful to window-shop at Newegg first.