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Summary: Checking an external hard drive to see how many gigabytes (GB) of storage space it has. Learn how to use external hard drives with these video instructions.
"This is Zach with Expert Village and today I am going to talk to you about finding the available space on an external hard drive and how to maximize your use of that space. In finder, control clicking on your drive brings up the context menu. From here you can click get info which will allow you to see the size of your hard drive which is called a capacity and how much of that space is available and how much of that is used. Now with most you will see that the hard drive is sold as a 250 gigabyte hard drive but due to the way the memory is allocated and arranged 250 gigabytes is really 250,000 megabytes but it takes a 1,024 megabytes to make a gigabyte, not a 1,000 so little numbers get lost here and there and usually labels like 250 or just rounds it up. So what we really have on our 250 gigabyte hard drive here is 233 gigabytes of space and you can see we've got 49 megabytes used and 233.59 gigabytes still free. If you find that you are running low on space on your hard drive, you might not be able to transfer as many files as you like to. One way you can clean up space on your hard drive is by going in finder and finding files that you don't need any more and removing them. "
eHow Article: How to Check Space on an External Hard Drive