How big hard drive should I buy for Time Machine?

Discussion in 'macOS' started by Cyborg21, Apr 1, 2014.

  1. Cyborg21 macrumors 6502


    Sep 2, 2013
    Hello! I just switched to Mac so I don't really know so much things yet. I got a Retina MacBook Pro with 512 GB storage and I want to get a hard drive for Time Machine Backups. So how big storage is decent, 512 gb? 1 TB? Sorry for my bad english, thank you
  2. maflynn Moderator


    Staff Member

    May 3, 2009
    I believe TM recommend 2x to 3x the size of your drive, so I'd say 1 to 2tb drive should work
  3. Fzang macrumors 65816


    Jun 15, 2013
    I've always just used a Time Machine the same size as my harddrive, with a couple of gigabytes to spare. You can do this if you only want to save a backup snapshot in case of your computer failing.

    You can also add some more space to the Time Machine and use it to store many many versions of some files that you edit frequently -- but since Time Machine only makes multiple copies of files that you actually change, I think 2x to 3x your disk size is massive overkill, unless you need several dated copies of giga-sized files.
  4. inscrewtable macrumors 68000


    Oct 9, 2010
    I do not use time machine because I prefer to have a bootable clone in case of HD failure, however if you want to use TM, I would suggest that you partition a 2TB drive into two partitions of 512GB and 1.5TB then use the 1.5TB partition for TM and the 512GB partition for a bootable clone using SuperDuper.

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