If you buy one album from Amazon MP3, they’ll upgrade your Cloud Drive storage to 20 GB for free for a year — another nice perk.

如果你从亚马逊上买一张MP3专辑，5GB将免费升级为20GB，期限1年。

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The upgrade is part of an effort by Amazon to give users better visibility into the status of their cloud resources.

这一提升是亚马逊为用户提供监测云资源服务的一部分。

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Customers who receive free Prime shipping benefits through our Amazon Student or Amazon Mom programs can upgrade to an annual paid membership to receive Amazon Prime's digital benefits.

ENGADGET: Amazon, Warner deal brings Fringe, The West Wing to Prime Instant Video exclusively

Roku was nice enough to upgrade our player for Amazon Video on Demand a little early, and we're basically impressed -- although we're not in love with SD video and stereo audio, it's hard to complain about a free service update.

ENGADGET: Roku Amazon Video on Demand hands-on Hands-on

Even if it can't convince current Kindle owners to upgrade their e-readers, Amazon's gadget is likely to keep selling briskly.

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