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Apple Computing Products:
macOS - Operating System
How to back up
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<blockquote data-quote="MacInWin" data-source="post: 1943508" data-attributes="member: 396914"><p>A couple of thoughts. TM (or Time Machine) under Ventura, which your profile says you are running, insists on "owning" the entire partition it is given to use. So, if you get that 2TB drive and make it for TM, all 2TB will be dedicated to TM and only TM. CCC and SD can share the drive with other uses, as long as it's not TM. </p><p></p><p>To get around TM's demands, you can use Disk Utility to create two separate partitions on the drive and let TM have one and use the other for CCC/SD. But then you have all backups on ONE device, and if it dies, you lose all backups. </p><p></p><p>Another thought is that TM will force a format to APFS in the partition it controls, and APFS is not optimized for rotating drives, which that one seems to be from the description. That's not a huge deal, if all it is used for is backups as the changes should be smaller than if it were a drive for every day use.</p><p></p><p>And finally, depending on how you copy the files from your internal drive to this external drive, the files may expand significantly. macOS compresses files as much as it can, but when those sparse files, as they are called, are copied, they may or may not be expanded to full size. That may or may not be an issue, just something to be aware of. If you have only 20-25GB of data to put on a 2TB drive, it will not run into problems, but don't be surprised if that 25GB of data shows as 30 or more GB on the external.</p><p></p><p>As for just copying "Documents, " manually, it would be better if you copied the entire folder with your name on it that you can see in /Users folder. That's ALL of your stuff. If you use CCC or SD, you can select that folder as the source and CCC/SD will handle it for you. TM backs up pretty much everything.</p><p></p><p>What would I do? I would look to see if I can get two drives, smaller, maybe 1TB SSDs instead of rotating drives, and use one for TM and the other for CCC/SD. That way I have two backups on two devices in two different formats. Yes, it costs a bit more, so if that's a restricting factor the other option is to just have the one drive and use either CCC or SD to make the backup so that the rest of the drive is available for anything else I might have. TM is good, but that demand that it have the control of the entire drive would mean that whatever device/partition I give to TM is ONLY for TM.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1943508, member: 396914"] A couple of thoughts. TM (or Time Machine) under Ventura, which your profile says you are running, insists on "owning" the entire partition it is given to use. So, if you get that 2TB drive and make it for TM, all 2TB will be dedicated to TM and only TM. CCC and SD can share the drive with other uses, as long as it's not TM. To get around TM's demands, you can use Disk Utility to create two separate partitions on the drive and let TM have one and use the other for CCC/SD. But then you have all backups on ONE device, and if it dies, you lose all backups. Another thought is that TM will force a format to APFS in the partition it controls, and APFS is not optimized for rotating drives, which that one seems to be from the description. That's not a huge deal, if all it is used for is backups as the changes should be smaller than if it were a drive for every day use. And finally, depending on how you copy the files from your internal drive to this external drive, the files may expand significantly. macOS compresses files as much as it can, but when those sparse files, as they are called, are copied, they may or may not be expanded to full size. That may or may not be an issue, just something to be aware of. If you have only 20-25GB of data to put on a 2TB drive, it will not run into problems, but don't be surprised if that 25GB of data shows as 30 or more GB on the external. As for just copying "Documents, " manually, it would be better if you copied the entire folder with your name on it that you can see in /Users folder. That's ALL of your stuff. If you use CCC or SD, you can select that folder as the source and CCC/SD will handle it for you. TM backs up pretty much everything. What would I do? I would look to see if I can get two drives, smaller, maybe 1TB SSDs instead of rotating drives, and use one for TM and the other for CCC/SD. That way I have two backups on two devices in two different formats. Yes, it costs a bit more, so if that's a restricting factor the other option is to just have the one drive and use either CCC or SD to make the backup so that the rest of the drive is available for anything else I might have. TM is good, but that demand that it have the control of the entire drive would mean that whatever device/partition I give to TM is ONLY for TM. [/QUOTE]
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