Full backup is a method of backup where all the files and folders selected for the backup will be backed up.  When subsequent backups are run, the entire list of files and will be backed up again. The advantage of this backup is restores are fast and easy as the complete list of files are stored each time. The disadvantage is that each backup run is time consuming as the entire list of files is copied again.  Also, full backups take up a lot more storage space when compared to incremental or differential backups.

Full Backup