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why does my Time Machine backup require more than 2x the gigabytes my hard drive is using?

I don't get it

iMac 27″, macOS 10.14

Posted on Oct 6, 2021 5:30 PM

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Posted on Oct 6, 2021 6:48 PM

It is generally recommended that you use a disk 2 - 3 times the size of your hard drive - the reason: TM does not delete backups; it creates an initial full backup and then keeps adding incremental backups of new content every hour. It will do so until the disk is almost filled; it will then delete the oldest backup to make room for the latest backup. It is designed to have backups available for you from many dates/backups in case you are looking for a particular one.

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Oct 6, 2021 6:48 PM in response to mknj

It is generally recommended that you use a disk 2 - 3 times the size of your hard drive - the reason: TM does not delete backups; it creates an initial full backup and then keeps adding incremental backups of new content every hour. It will do so until the disk is almost filled; it will then delete the oldest backup to make room for the latest backup. It is designed to have backups available for you from many dates/backups in case you are looking for a particular one.

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why does my Time Machine backup require more than 2x the gigabytes my hard drive is using?

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