Depending on the hassle you’re willing to put up with, you have at least two alternatives:
- Pay someone to give you space to backup your data to. This is usually referred to as “cloud backup” and the most secure service I’m aware of is SpiderOak. The most commercially attractive (cheap, good deals etc) is CrashPlan Central.
- An alternative that’s much more labour-intensive (DIY) is to buy a few 1TB external hard drives (they go for £60 a pop nowadays) and give them to your friends/family. Then use CrashPlan to backup to their computers (really, the hard drives you gave them), without paying any usage charges to CrashPlan.