Seeking to assuage the file-loss fears of USB fob-dependent PC users, SanDisk has announced Cruzer Titanium Plus, a 4GB USB flash drive that automatically backs up files to an online data store, thanks to a partnership with Israel-based startup BeInSync. Priced at $59.99, Cruzer Titanium Plus mirrors documents, photos, digital music and videos to BeInSync’s online backup service. The service, which taps Amazon’s S3 storage services infrastructure, is free for the first six months, after which a subscription fee of $29.99 per year applies.The service allows Windows 2000-, XP-, and Vista-based Cruzer Titanium Plus users to sync files whenever the USB drive is plugged in to an online PC. Changes to the USB drive store that are made while offline are automatically mirrored once a connection to the Internet is re-established. Files deleted from the USB drive linger in the cloud for up to 30 days, or until the BeInSync 4GB backup capacity has been reached.The move is part of a growing trend toward providing mobile workers greater levels of storage assurance using the familiar USB drive idiom. Rover Technology Fusions recently paired up with IBM to extend CDP (continuous data protection) capabilities to laptops by way of a 2GB credit-card-size USB drive. Cloud Storage