Mozy was one of the first and most respected vendors of online backups. It is a pure file backup solution, with a PC client for both the MAC and the PC. They offer a great 2GB FREE account, and also have 50 GB and 125 GB accounts available for very reasonable prices.
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MozyPro Review - Professional Online Backup
MozyPro offers professional services that help backup significant business resources. Backup plans are priced per computer / per gigabyte, so its very flexible for any business size, from small business to large corporations. Server backups are also available. MozyPro Best Offer Click here
One of the only services we have found that offers unlimited storage and bandwidth as their default pricing plan, this is a great deal!. iPhone and iPad apps as well as a sync folder are great too. LiveDrive Best Offer Click here now >>
We like this service because it offers automatic backup, web access, and a mapped drive, really everything you could need. Free account gives the standard 2 Gigabytes. Great service with tons of features.
ElephantDrive Best Offer - Click here now >>
SugarSync doesn't offer unlimited sapce, but they do have accounts up to 250 GB, plenty of space for most users and a lot more than some of the other services. They make backups super easy, and they also offer a host of other tools for syncing and sharing across multiple devices.
SugarSync Best Offer - Click here now >>