What is the difference between full, incremental, and differential backups?

Choosing the right backup strategy is critical for saving disk space and data recovery time. A full backup is an exact copy of all selected files and folders. This method provides the easiest and fastest recovery since all necessary data is in one place. However, creating full copies takes a lot of time and a significant amount of storage space, which is why it is usually performed less frequently, for example, once a week.

An incremental backup saves only the data that has changed since the last backup of any kind, whether full or incremental. This approach minimizes script runtime and significantly saves storage space. The main disadvantage is the complexity of the restoration procedure: to return the system to an up-to-date state, you first need to deploy the last full backup and then sequentially apply all incremental archives created after it.

A differential backup records changes made exclusively since the last full backup. As changes accumulate, the size of such a copy increases every day until the next full backup. Data restoration here is faster than with the incremental method, as only the last full and last differential archives are needed. Understanding these differences helps properly balance between backup creation speed and the convenience of data recovery in working projects.