Dropbox artworkWeb storage service Dropbox has signed deals with Japanese mobile carrier Softbank and cell phone manufacturer Sony Ericsson to accelerate its international expansion in Asia and Europe.

Dropbox’s mobile application will be preloaded on Sony Ericsson’s Android smartphones on European and Asia-Pacific countries starting today, Bloomberg reports. Softbank will have Dropbox pre-installed on two of its Android phones. The terms of the deals were not disclosed.

Softbank is Japan’s third largest mobile carrier. It will promote Dropbox in its 7,000 retail locations. Softbank’s customers will get an additional 1 gigabyte of storage space free of charge.

Japanese-Swedish Sony Ericsson is now focusing on Android smartphones. The company hasn’t been performing that well in the recent years. Its worldwide market share has dropped to approximately 5 percent. But now it thinks that focusing on Android system with a new product lineup will make things better. According to Bloomberg, Chief Executive Officer Bert Nordberg said in March that the company is aiming to expand its global share of Android handsets to 25 percent from 14 percent at the beginning of this year.

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San Francisco–based Dropbox has currently 25 million users worldwide. The service offers easy access to files from anywhere on Windows PCs , Apple’s Macintosh computers and iOS devices, Google’s Android devices and BlackBerry phones.

One of the core features is the possibility to share content with other Dropbox users or even make it publicly available, which makes large email attachments unnecessary. You can upload necessary documents to Dropbox’s server and just share the link to the recipient.

Users get 2 gigabytes of free storage space and with a monthly fee, they will get additional storage space, up to 100 gigabytes with $19.99 a month.

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