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Setting up email on imac
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<blockquote data-quote="MacInWin" data-source="post: 1541439"><p>Wow! Big drive...nice. Your backups will depend on two things: 1. How much stuff you put on that 3TB internal drive and 2. How often that stuff changes. </p><p></p><p>The way TM works is that on the first backup it backs up everything, then each subsequent backup is incremental, i.e, only what has changed. So let's say you have two files, A and B. On the first backup A and B are copied to the TM drive. When the next scheduled backup occurs, A has been changed so now the TM drive will have A, A' and B where A is the original, A' is the current and B is the original unchanged file. This action will continue with each backup. At some point the TM drive starts to get full, in which case TM deletes the oldest backups to make room. So, if you fill that 3G internal drive with lots of large files and change them frequently TM will back them up until it runs out of room. That functioning is why we recommend twice the size, but in your case I think it's more important that it be at least twice what you originally load on the internal drive.</p><p></p><p>Hope that helped you in your planning.</p></blockquote><p></p>
[QUOTE="MacInWin, post: 1541439"] Wow! Big drive...nice. Your backups will depend on two things: 1. How much stuff you put on that 3TB internal drive and 2. How often that stuff changes. The way TM works is that on the first backup it backs up everything, then each subsequent backup is incremental, i.e, only what has changed. So let's say you have two files, A and B. On the first backup A and B are copied to the TM drive. When the next scheduled backup occurs, A has been changed so now the TM drive will have A, A' and B where A is the original, A' is the current and B is the original unchanged file. This action will continue with each backup. At some point the TM drive starts to get full, in which case TM deletes the oldest backups to make room. So, if you fill that 3G internal drive with lots of large files and change them frequently TM will back them up until it runs out of room. That functioning is why we recommend twice the size, but in your case I think it's more important that it be at least twice what you originally load on the internal drive. Hope that helped you in your planning. [/QUOTE]
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