File synchronization (often referred to as syncing) can be understood as the process that ensures that computer files in different locations are updated via a certain set of rules.
File synchronization can be of different types. One-way file synchronization is also known as mirroring, and in this the updated files are moved from one source location to another target location, but the files are not copied back in the source location.
On the other hand, in two-way file synchronization, the updated files get copied in both directions- the source as well as the destination. This is done with the purpose of keeping the two locations identical with each other.
File synchronization is important as it is generally used for backups on hard drives or for updating the USB drives. The process of file synchronization is now automatic and prevents copying of identical files. This helps the process to be faster and saves a lot of time. It is also less prone to errors.