Time Machine Issue

Discussion in 'MacBook' started by chattahoochee, Mar 17, 2013.

  1. chattahoochee macrumors 6502

    Dec 30, 2012
    Palmetto Florida
    Setting up "Time Machine" I select my external hard drive which has 176 GB available. Time machine demands I delete all thats on the external hard drive. This is ridicules, with 176 GB of available space, why would this present a problem to "Time Machine" ?
  2. simsaladimbamba

    Nov 28, 2010
    Have you checked Finder > select external HDD >> GET INFO >>> Format yet?

    I presume, it is not using the correct Format, which would be Mac OS Extended (HFS+), thus your OS wants to format the HDD correctly.


    Overview of the four major file systems (called "Formats" in Mac OS X) used on Windows and Mac OS X, compiled by GGJstudios. You can use Disk Utility to format any HDD to your liking.

    Any external hard drive will work with PCs or Macs, as long as the connectors are there (Firewire, USB, etc.) It doesn't matter how the drive is formatted out of the box, since you can re-format any way you like. Formatting can be done with the Mac OS X Disk Utility, found in the /Applications/Utilities folder. Here are your formatting options:

    HFS+ (Hierarchical File System, a.k.a. Mac OS Extended (Journaled) Don't use case-sensitive)

    NTFS (Windows NT File System)
    • Read/Write NTFS from native Windows.
    • Read only NTFS from native Mac OS X
      [*]To Read/Write/Format NTFS from Mac OS X, here are some alternatives:
      • For Mac OS X 10.4 or later (32 or 64-bit), install Paragon (approx $20) (Best Choice for Lion)
      • For 32-bit Mac OS X, install NTFS-3G for Mac OS X (free) (does not work in 64-bit mode)
      • For 64-bit Snow Leopard, read this: MacFUSE for 64-bit Snow Leopard
      • Some have reported problems using Tuxera (approx $36).
      • Native NTFS support can be enabled in Snow Leopard and Lion, but is not advisable, due to instability.
    • AirPort Extreme (802.11n) and Time Capsule do not support NTFS
    • Maximum file size: 16 TB
    • Maximum volume size: 256TB
    • You can use this format if you routinely share a drive with multiple Windows systems.

    exFAT (FAT64)
    • Supported in Mac OS X only in 10.6.5 or later.
    • Not all Windows versions support exFAT. See disadvantages.
    • exFAT (Extended File Allocation Table)
    • AirPort Extreme (802.11n) and Time Capsule do not support exFAT
    • Maximum file size: 16 EiB
    • Maximum volume size: 64 ZiB
    • You can use this format if it is supported by all computers with which you intend to share the drive. See "disadvantages" for details.

    FAT32 (File Allocation Table)
    • Read/Write FAT32 from both native Windows and native Mac OS X.
      [*]Maximum file size: 4GB.
    • Maximum volume size: 2TB
    • You can use this format if you share the drive between Mac OS X and Windows computers and have no files larger than 4GB.
  3. chattahoochee thread starter macrumors 6502

    Dec 30, 2012
    Palmetto Florida
    In this sase, Mac is not installed on the PC, it is the other way around, I used "BootCamp to install Windows XP with Snow Leopard OS X 10.6.8 on a MacBook which is somewhere around 2006 to 2008. I am sharing the "External HDD with both & saving files manually. However, if it is possible, I would like to have the backup automatic. To reformat the external HDD to (HFS+) this may stop the sharing. If so, I'll continue doing the saving manually.
  4. seveej macrumors 6502a


    Dec 14, 2009
    Helsinki, Finland

    As long as your data structure is manageable (meaning that you know where the data for each backup lies and it not a hassle) manual backing up is by no means an unworkable solution.

    Naturally you could also get a separate drive for each operating system's backups. So for instance assuming that your use is concentrated on the Mac side and your windows use is sporadic, you could use an external HDD for time machine and manually backup the windows-side data on a USB memory dongle.


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