The product was soft-launched this month with a website, Web application and smartphone applications delivered for some platforms.

Under the service, customers on Optus' mobile network can sign up for the service and choose a free 500MB storage limit, or add 10GB or 300GB storage limits for $5.99 and $14.99 per month, respectively.

Each account can back up and access data from five assigned computers or devices, either through a Web-based application or smartphone applications currently supporting Windows Mobile 6 as well as some versions of Android and Symbian S60.

The smartphone applications include automatic backup software provided by and delivered over 128-bit SSL 3DES encryption.

Mobile data used to back up and retrieve data from the service would be unmetred, though any data used over the service through Optus' fixed network would still count towards user upload and download quotas.