Match all files from drive A to drive B?

Discussion in 'Mac Apps and Mac App Store' started by H.Finch, Feb 17, 2017.

  1. H.Finch macrumors regular

    Joined:
    Jun 9, 2013
    #1
    Hi all,
    Quick question:

    I have an external drive with all my work-related files. Call it ‘disc A’.
    I have a second external drive, to backup that fist one. Let’s call it ‘disc B’.

    I usually tag the new files on disc A so when I connect my backup drive B, I can select those and copy them (manually) to drive B.

    But… I was wondering if there isn’t a little app somewhere in which I can say: Drive A is my master drive, Drive B is a slave-drive, and let this app scan both and match the files from Drive A to Drive B. So that I never overlook something.

    I hope I’m getting this across :)

    Does anyone know such an app? Doing it manually in Finder by dragging the new files and folder from A to B every week seems very archaic.

    Any tips or insights would be very welcome!
     
  2. hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #2
    You might check out Carbon Copy Cloner (CCC)

    https://bombich.com

    You can start it manually, have it start on a schedule, or have it start when it sees the external drive connected.
     
  3. H.Finch thread starter macrumors regular

    Joined:
    Jun 9, 2013
    #3
    I've seen that app... but I thought that was 'only' for bootable backups... In essence I need an app that builds an index of drive A, and an index on drive B, and matched index A to B...
     
  4. hfg, Feb 17, 2017
    Last edited: Feb 17, 2017

    hfg macrumors 68040

    hfg

    Joined:
    Dec 1, 2006
    Location:
    Cedar Rapids, IA. USA
    #4
    Yes, it will make a bootable backup if that is what you want. I use it to "update" my backup disk such that it only copies the new files (deleting the old version if desired ... program option) and doesn't waste a lot of time copying files which haven't changed. I suspect it does internally something similar to that which you described above.

    I run CCC automatically once a night for desktop machines with attached backup drives. For laptop computers, it runs automatically whenever I attach the external portable disk drive.

    Of course, the OS X built-in Time Machine will also do what you want, and will save historical versions in the event you want to roll-back a file, folder, or the whole disk. This does take a larger backup disk ... recommended 1.5 to 2 times the original data size. After the initial backup which can take some time, the incremental backups usually only take a minute or so and I don't even notice them happening in the background.
     
  5. mpainesyd macrumors 6502

    mpainesyd

    Joined:
    Nov 29, 2008
    Location:
    Sydney, Australia
    #5
    I have been using Goodsync for a similar purpose (synchronising folders on an iMac and Macbook). It works well. It will ask for instructions if it comes across a conflict such as newer files on both disks.
     
  6. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #6
    I use ChronoSync for this.
    https://www.econtechnologies.com/chronosync/overview.html
     
  7. H.Finch thread starter macrumors regular

    Joined:
    Jun 9, 2013
    #7
    Thanks a lot guys! I will look into CCC, Goodsync and Chronosync! I'm sure one of those 3 will be exactly what i need...
    PS. This won't be complicated by the fact I have filevault turned or will it? (propbaly not was my guess)
     
  8. MacUser2525 macrumors 68000

    MacUser2525

    Joined:
    Mar 17, 2007
    Location:
    Canada
    #8
    If you are not scarred of the command line and want to use a builtin OSX tool then open Terminal and type in and hit enter key.
    Code:
    rsync -avP /Volumes/disc\ A/* /Volumes/disc\ B/
    
    This will do the same as any of the tools mentioned using the same program they are going to use to do the job graphically. Add --delete after the -avP if you want rsync to delete files on the disc B that are no longer present on the disc A and a --dry-run added in will do test run to show you what will happen before you remove it to do the actual operation.
     
  9. HobeSoundDarryl macrumors 603

    HobeSoundDarryl

    Joined:
    Feb 8, 2004
    Location:
    Hobe Sound, FL (20 miles north of Palm Beach)
    #9
  10. twinthumbs macrumors newbie

    twinthumbs

    Joined:
    Feb 22, 2017
    Location:
    Colorado
    #10
    rsync is the cheapest (free) native option. ROBOCOPY does it too if/when you switch to and/or use Windows.
     

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