Carbon Copy Cloner
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Full user review
"powerfull tool but now payware"
powerfull tool to clone Volumes, it provides fast making BackUp of folders or Volumes and it's easy to use
now payware, so if you have used ccc for BackUp until now, you need to use another free tool or you have to pay
if you want to pay for software i.e. if you do not want to use freeware, ccc could be a powerful tool, but first you should compare, whether ccc fits your need or other payware fits better