I saw many people ask the question about the best free backup software for Windows 8 here.
Personally I think, the free backup software for Windows 8 is even worse than Windows 8 built-in backup software. Why not waste so much time to search free backup software for Windows 8?
But if you feel the features in Windows 8 backup and restore center are not enough for your daily use, then just turn your face to Norton Ghost, Acronis or other commercial backup software.
Though they are not free, yet they are not expensive. Compared with your precious data, the price for Windows 8 data backup software is cheap enough.