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If a manufacturer does not publish the speed of the internal drive thats used, its probably because its not very fast.

A modern video-editing program such as Adobe Premiere requires high performance from the processor, RAM memory, GPU (if using GPU acceleration), as well as storage drives.

Choosing a fast storage solution can be a little tougher than picking the fastest computer processor, as there are more tradeoffs involved.

The largest drives arent always the fastest, and speeds can vary a great deal.

This guide was created to help you choose the right storage drive (or drives) for your editing needs, from the small to the large.

The biggest determining factor is what codec and resolution you will be editing in primarily, since the amount of space that different video codecs occupy varies widely.

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ProRes HQ, a popular editing codec, will set you back about 112GB an hour, whereas 1080p AVCHD only takes up about 11GB.

Most codecs rate their speed in bits per second, whereas most hard drives publish their speeds in bytes per second.

XDCAM EXs 35Mbs is actually only 4.5MBs.

A handy tool for determining the amount of bandwidth you need is the AJA DataCalc app, which is available for Windows and Mac at AJAs website.

This tool lets you pick the codec you will be using, and it tells you how much bandwidth a single track of that codec needs in bytes per second.

If you will only be doing simple editing with some transitions and text overlays, then twice the bandwidth is probably enough.

However, if you plan on doing multi-camera cutting in real time, or using a large number of layers simultaneously, you are going to need far more.

Below are a few popular codecs, as well as the amounts of bandwidth they require.

Current high-end 7200 rpm 3.5 drives are able to reliably deliver speeds at 150MBs or higher, in capacities as high as 4TB, which is enough to play back numerous tracks of lightly compressed video, such as DnxHD or ProRes.

Some recommended 3.5 drives are the 4TB Western Digital Caviar Black, the 3TB Seagate Barracuda, or the 4TB Hitachi Deskstar.

All of these drives should give you at least 150MBs of sustained transfer speed for video editing.

These kinds of drives are often not designed to sustain those speeds.

It is a 10,000 rpm 2.5 drive on a large heat sink designed to fit into 3.5 drive bays.

Aside from speed, their main advantage is their near-instantaneous seek times, as well as their ability to read many small files at nearly the same speed as one large file.

This is excellent for storing operating systems and programs, as they often require accessing large numbers of small files.

However, for video editing, what you really need is a sustained transfer rate, and while SSDs are still faster than hard drives for this, its not by as much you may have thought.

A high-end SSD will give you around 400MBs sustained transfer speed, though at a vastly higher price per GB than a hard-disk drive.

If money is no object, or if you dont need that much storage space, then SSDs are great.

Otherwise, if you need more speed than a single hard drive can deliver at a more reasonable price per GB, then RAID drives can be a great fit.

The best external single-drive setups use high-performance 7200 rpm drives, like the ones discussed earlier.

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