Editing Backup (section)

====Incremental====
An [[incremental backup]] stores data changed since a reference point in time. Duplicate copies of unchanged data are not copied. Typically a full backup of all files is made once or at infrequent intervals, serving as the reference point for an incremental repository. Subsequently, a number of incremental backups are made after successive time periods. Restores begin with the last full backup and then apply the incrementals.<ref name="Tech-FAQIncrementalBackup">{{cite web |title=Incremental Backup |url=http://www.tech-faq.com/incremental-backup.shtml |website=Tech-FAQ |publisher=Independent Media |access-date=10 March 2006 |archive-url=https://web.archive.org/web/20160621090117/http://www.tech-faq.com/incremental-backup.shtml |archive-date=21 June 2016 |date=13 June 2005}}</ref>
Some backup systems<ref name="PondHowTimeMachineWorks">{{cite web | last1=Pond | first1=James | url=http://baligu.com/pondini/TM/Works.html | title=How Time Machine Works its Magic | website=Apple OSX and Time Machine Tips | publisher=baligu.com | access-date=19 May 2019 | date=31 August 2013 | at=File System Event Store, Hard Links | archive-date=21 June 2019 | archive-url=https://web.archive.org/web/20190621092705/https://www.baligu.com/pondini/TM/Works.html | url-status=dead }}</ref> can create a {{visible anchor|synthetic full backup}} from a series of incrementals, thus providing the equivalent of frequently doing a full backup. When done to modify a single archive file, this speeds restores of recent versions of files.