Finding a good free backup solution is easier than you’d think. A host of companies offer free online backup or free backup software—and perhaps surprisingly, nearly all of them are quite competent. Of course these companies have ulterior motives. Their free versions usually only provide enough storage for essential data, or lack some advanced features that pros would want. They hope you’ll love the program or service so much, or find it so useful that you’ll eventually fork over some cash for additional storage or those advanced features. But wait, you say: I have free online storage through …