Time Machine, Snow Leopard, and backing up documents

Discussion in 'Mac Basics and Help' started by iceblade, Jun 22, 2011.

  1. iceblade macrumors member

    Jun 17, 2008
    About a month and a half ago I got a 1 TB external HDD that I have been using as a Time Machine drive. However, two issues have arisen. The first is, I am running out of internal HDD space -- I have less than a gig! The second is, I am interested in upgrading to Snow Leopard.

    I need more space on my internal HDD, obviously. To accomplish that, I was thinking I could backup school documents, pictures, and video to a separate partition on the HDD. That way, I don't have to restore my computer to a previous backup every time I want to access those files. However, that caused the question to arise, does Time Machine back up simply things that have been changed, who does it make a whole new 'copy' of my HDD each time it backs it up? In other words, will it eat external HDD space 150 gigs at a time, or by, say, a gig at a time? Clearly, I don't have a very good understanding of how Time Machine works.

    The last question regards my Snow Leopard upgrade. Can I restore my computer to Snow Leopard using a Leopard time machine (assuming the upgrade doesn't work correctly in the setup)?

    I hope that all makes sense. If not, let me know, and I will attempt to clarify it.

  2. alust2013 macrumors 601


    Feb 6, 2010
    On the fence
    Time machine is incremental backups, it will take up the full size of your internal drive, plus a bit more for each backup. It will just delete the old stuff when it runs out of space. You also can't restore a backup from a different version of OS X.

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