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Apple Computing Products:
macOS - Operating System
Upgrade to Catalina and external hard drives.
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<blockquote data-quote="MacInWin" data-source="post: 1865809" data-attributes="member: 396914"><p>I've been rethinking backup drive sizes. I use a strategy of a CCC backup for immediate recovery and to use while a new drive is on the way to replace any dead drive. I also use TM for hierarchical backups--just in case I mangle or erase a file I need to restore. Also a deep backup in case CCC doesn't work and to instal the new OS when the new drive arrives.</p><p></p><p>So, with that approach, my CCC drive only needs to be the same size as my boot drive. Right now my internal drive is 1Tb, but has 600 GB free, so my CCC clone is on a 1TB SSD (USB3). My TM drive is a spinner, 2TB, or double the size of the internal. I'm ok with that because it can hold a lot of history before it starts cleaning up backups. The old rule of "double the size of the source drive" isn't so much a rule now, as a suggestion, or maybe consideration.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1865809, member: 396914"] I've been rethinking backup drive sizes. I use a strategy of a CCC backup for immediate recovery and to use while a new drive is on the way to replace any dead drive. I also use TM for hierarchical backups--just in case I mangle or erase a file I need to restore. Also a deep backup in case CCC doesn't work and to instal the new OS when the new drive arrives. So, with that approach, my CCC drive only needs to be the same size as my boot drive. Right now my internal drive is 1Tb, but has 600 GB free, so my CCC clone is on a 1TB SSD (USB3). My TM drive is a spinner, 2TB, or double the size of the internal. I'm ok with that because it can hold a lot of history before it starts cleaning up backups. The old rule of "double the size of the source drive" isn't so much a rule now, as a suggestion, or maybe consideration. [/QUOTE]
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