Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: as external hard drive?
Document: I lost everything. Fortunately I keep all my important unreplacable files on external hard drives, otherwise id by crying right now. Don't do what i did... Buy a different drive... This isn't one of the reliable seagates we all know.
This Hard drive is awesome, I am using it on my laptop now since external case I bough came DOA. I see a much performace increase compared to the 5200rpm 160GB HDD that came with it. I would buy another one and probably will.
Do not let positive reviews and excuses about this being a 'rare failure' lure you into purchasing this shoddy piece of equipment, known to be defective but still being distributed! This is one of the most unreliable hard drives I have ever had the displeasure of using. I have had bad luck in general with Seagate drives, even on external disks that are not being taxed by running an OS.Reliability is key in a hard drive, and this drive does not measure up in the least.
Wanted to have a portable external drive. Bought a drive case for the old 320 MB, and installed the 500 MB in the computer. Easy as can be.
between the seagate website and this hdd it was easy  to clone and install this product. You must reg. this product for their cloneing pkg to download. Once the hdd was installed into enclosure it became easy  from there. I would just recomend if you plan to use their hdd enclosure to create a external drive don't buy it. Spend the money on a hdd dock. Better quality.
I also a fan of seagate owning an external hdd for about a year now without ever haveing any problems.
This is a very bad hard drive. It died on me after only 1 day use. Don't buy this product.
Great Hard Drive... you will not be disappointed. 500Gb is a lot of space.. Buy now one for you.. you need it
I installed the drive in my laptop.The computer indicates there is no hard drive installedI won't buy another
Got this hard drive and definitely was the right purchase for my laptop. Works perfectly and i haven't ad no problem what so ever.
Answer: It came as a bare drive.  I used it to replace a 5400rpm laptop drive.  If you want to use it as an external hard drive you will need to buy a separate case for a 2.5 inch Sata hard drive.