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<blockquote data-quote="Terry_C" data-source="post: 1937257" data-attributes="member: 410452">Since updating to Sonoma my Time Machine backups have become very slow stalling around 70% at 700-800MB it will eventually finish but if I re-run it immediately again, it will do the same thing and eventually back up around 1GB of data each time even though I have not made any changes between backups, i.e added new large files etc. When preparing the backup the number of changes logged is often 6000+ within minutes of the previous backup.To a layman like me it seems as if it's continually backing up some old data as well as anything new. I have created new documents and checked that they do get included but they are only a few Kb. Usually (previous to Sonoma) my backups (according to Time Machine in the menu bar were usually of the order of a few MB and completed quickly).I have used Onyx Maintenance to delete old snapshotsChecked the backup drive with Disk Utility and WD drive utilities.I can access random backups back to 2020 ok.I have 1TB WD drive with 194 GB free. Used space on my 1TB HD is only 268GBI note that others have had similar problems on the Apple Support Community since Sonoma but with no single resolution.Does anyone have any ideas please?Thank youTerry</blockquote>

[QUOTE="Terry_C, post: 1937257, member: 410452"] Since updating to Sonoma my Time Machine backups have become very slow stalling around 70% at 700-800MB it will eventually finish but if I re-run it immediately again, it will do the same thing and eventually back up around 1GB of data each time even though I have not made any changes between backups, i.e added new large files etc. When preparing the backup the number of changes logged is often 6000+ within minutes of the previous backup. To a layman like me it seems as if it's continually backing up some old data as well as anything new. I have created new documents and checked that they do get included but they are only a few Kb. Usually (previous to Sonoma) my backups (according to Time Machine in the menu bar were usually of the order of a few MB and completed quickly). I have used Onyx Maintenance to delete old snapshots Checked the backup drive with Disk Utility and WD drive utilities. I can access random backups back to 2020 ok. I have 1TB WD drive with 194 GB free. Used space on my 1TB HD is only 268GB I note that others have had similar problems on the Apple Support Community since Sonoma but with no single resolution. Does anyone have any ideas please? Thank you Terry [/QUOTE]

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