CDP stands for continuous data protection. Basically it is a real-time backup protection of your data, on the contrary from snapshots that don’t provide real time protection. It means that every time your protected data is changed, it is automatically backed up. It will allow you to recover your data to the specific moment you want to recover it, and not to scheduled data backup – as it is from traditional backups. You don’t need to schedule CDP, since whenever new data will be saved to disk it will automatically be backed up in your secure location. That will ensure you no data loss. From the technical point of you the main difference is that CDP only replicates changed blocks and not entire files, which ultimately will allow you to save your disk space.