If 256GB just isn't enough for your ultrabook-toting needs, things are set to change. Mushkin has announced what it claims to be the "world's first" 480GB mSTATA SSDā€”and it will be available in January.

Slim laptopsā€”we're talking ultrabooksā€”don't have room for even a standard 2.5-inch SATA SSD, so use a smaller form factor known as mini-SATA (mSATA). Until now, the broadly accepted upper capacity limit to those drives has been 256GB. Apple offers a 512GB upgrade when you buy a MacBook Air, but there are very few third-party, high capacity SSDs available to upgrade with.

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Mushkin's new drive packs 480GB of storage, offers up transfer speeds of up to 6Gb/s, and comes with a three year warranty. Price? A fairly eye-watering $500. If $1 a GB isn't too rich for you, you'll be able to pick one up in January. [Engadget]