What is an incremental backup and how is it different from a full backup?

A full backup copies everything — every file and folder to a backup location. An incremental backup copies only the files that have changed since the last backup, so it's faster and uses less space. You need the full backup plus all incremental backups to restore everything.

Backups protect your files in case something goes wrong. A full backup copies your entire computer or phone to a backup location. It takes longer and uses more storage space, but it's complete. An incremental backup only copies the new or changed files since the last backup, so it's much faster and uses less space. The right strategy is to do a full backup once, then run incremental backups regularly.