1. Full backup
   1. A full backup takes backup of all the files regardless ofwhether they have been changed since the last full backup.
2. Incremental backup
   1. This type of backup only backup the files that changed after taking the last backup. To store all the files to previous state, we need a full backup and all the incremental backups.
3. Differential backup
   1. A differential backup means taking backup of all the changes that took place since the last full backup. This backup can be stored with a full backup and the last differential backup. Differential backup can be sub-divided into two -simple differential and multi-level differential backup. A multi-level differential backup is based on the same concept as simple differential backup except that it has nine levels. Any level of differential backup takes backup of files that has changed since the last full backup or the last lower level differential backup. For instance, if a full backup was most recent than a specific level of differential backup, then the level x differential backup will backup all files that has been modified since the last full backup, not the last taken differential backup.
4. One important thing about backup is the status of archive bit. When archive bit is set to zero, it indicates that the files have been backed up, while an archive bit set to one means it has not been backed up. Remember that both incremental and full backup set the achieve bit to zero when the backup completes, which means when you take a full or incremental backup, your files will have archive bits set to zero. Only the differential backup keep the archive bit unchanged after taking a backup.
5. Full Backup
   1. he type of backup cause longest type of outage during the backup time.It is the most expensive type of backup because it takes maximum amount of storage space among all types of backup. It also takes much longer time to run than its other counterparts.
   2. Recovery requires just one single read form the backup storage device. No dependency between the two full backup. If one is lost you may use another recent full backup to recover certain amount of data, not everything.
6. Incremental
   1. Less media storage is required since it back up only the files that changed since the last backup.It take much less time in comparison to other types of backup.
   2. Recover requires a full backup and all the incremental backup.A complete data recovery depends on the all the incremental backups and the last full backup.
7. Differential
   1. Since differential backup takes backup of a series of changes since the last full backup, it requires less of number of backup sets to restore.They provide efficient recovery when full backup is taken rarely( e.g. monthly)
   2. The amount of storage required for a differential backup may exceed than that is required for incremental backup when significant amount of data changes regularly.
8. Link
   1. http://securitywing.com/types-backup-difference-full-incremental-differential/