Should I convert my external HDDs to APFS?

Discussion in 'macOS High Sierra (10.13)' started by lisq199, Nov 12, 2017.

  1. lisq199 macrumors newbie


    Jun 29, 2015
    I'm not worried about compatibility with Windows or older macOS. What I'm worried about is the fact that APFS is optimized for SSDs. So will APFS potentially make my HDDs unreliable or slower? What's your experience with APFS with traditional HDDs? Thanks!
  2. pika2000 macrumors 601

    Jun 22, 2007
    Haven't tried it, but I don't think the option to format to APFS would appear on regular hard disks.
  3. gmanist1000 macrumors 68030


    Sep 22, 2009
    I converted my 4TB external spinner to APFS Encrypted and have about 1TB of data on it.

    I use it almost daily and have had 0 issues.
  4. mattguy10 macrumors 6502a


    Aug 18, 2010
    I’ve done this too on a 3TB external spinner and have about 500GB of data on it with 0 issues as well.
  5. ncrypt macrumors 6502

    May 16, 2012
  6. nicholasg macrumors member

    Sep 12, 2011
    No issues here with a 12 TB RAID 1 array.

    I tried to use an external APFS HDD with Time Machine, and High Sierra converted it to HFS+. Later learnt that Time Machine can not run on APFS drives.
  7. MrAverigeUser macrumors 6502a


    May 20, 2015
    may I just ask you why you want to switch from an (even for SSDs) absolutely stable and fast filesystem like HFS+ to APFS?

    I just don´t understand - because HFS+ runs extremely fast and absolutely secure on SSDs...

    Space on HDDs and SSDs nowadays is also no more expensive - so if your filesystem will not be faster nor more stable nor much cheaper - why the hell taking the high risk facing really big problems using a new filesystem ?

    Even if you want to "gain space" using APFS, is the little difference (if even existing and worth mentioning under real daily conditions) worth a higher risk to loose data, loss of time for going back and forth with the 2 systems, taking the risk of non-existing compatibility (as for Time Machine) and learning bitter things by the hard way?

    It is just a question - I´d wait at least 1-2 years to be shure this "just works" ...
  8. Fishrrman macrumors P6


    Feb 20, 2009
    Agree with post 7 above.
    HFS+ "just works", and it's well-tested.
    APFS is kinda "too new to be foolin' with now".

    My opinion only.
  9. kagharaht macrumors 6502a

    Oct 7, 2007
    If its a portable USB powered HDD, don't do it. It will fail to mount multiple times on various machines. I did it on WD and Seagate 2TB drives. It works once mounted but usually you have to use Disk Utility to make it show up. Also once in awhile it won't unmount normally. You have to Force Unmount it. Reverted back to HFS and it works flawlessly again.
  10. AmazingRobie macrumors 6502


    Jun 10, 2009
    Agree with other posters that say not to mess with it. The way things are going at Apple, they'll have an even newerererer file system in 6 months.
  11. TheAnvil macrumors regular

    Nov 25, 2013
    Why do you want to sacrifice compatibility with 90% of the machines out there for the sake of having something "new"?

    At least wait until drivers for Windows\Linux come out.
  12. brainburst1 macrumors newbie


    Dec 19, 2016
    No don't do it. All drives fail eventually and recovery from APFS will be difficult.
  13. canyonlight macrumors member

    Sep 3, 2011
    So I'm concluding that the best thing to do is to stick with Sierra for now.
  14. deepakvrao macrumors 6502

    Oct 16, 2011

    Not really. This thread was whether it would be worth it to format external drives to APFS.
  15. canyonlight macrumors member

    Sep 3, 2011
    Thank you Deepak.
  16. posguy99 macrumors 6502a

    Nov 3, 2004
    Although the best thing to do *is* to stick with Sierra. HS really doesn't have anything for most people.

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15 November 12, 2017