My External HD's & Flash Drives Don't Work on PCs!

Discussion in 'macOS' started by HappyDude20, Feb 20, 2011.

  1. HappyDude20 macrumors 68020

    HappyDude20

    Joined:
    Jul 13, 2008
    Location:
    Los Angeles, Ca
    #1
    I can only guess that both my external HD's and Flash Drives are formatted differently, cause all of them (when connected) work flawlessly on my sisters MacBook Pro and my buddies MacBook Air...

    However, when I attempted to connect either of these devices to my dad's Windows 7 laptop, or any Windows laptop...they aren't recognized..

    I'm guessing my external HD's and Flash Drives are only formatted for Mac only....of which I always use Disk Utility.

    It seems all of my External HD's and Flash Drives are formatted under as "Mac OS Extended (Journaled)"

    ....I'm simply wondering how I should format them in order for them to show up both when connected to a Mac and a PC. :apple:
     
  2. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #2
    FAT32 (File Allocation Table)
    • Read/Write FAT32 from both native Windows and native Mac OS X.
    • Maximum file size: 4GB.
    • Maximum volume size: 2TB
    • Maximum files per volume: 4,194,304
    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: Install NTFS-3G for Mac OS X (free)
    • Some have reported problems using Tuxera (approx 33USD).
    • Native NTFS support can be enabled in Snow Leopard, 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
    • Maximum files per volume: 4,294,967,295
    HFS+ (Hierarchical File System, a.k.a. Mac OS Extended)
    • Read/Write HFS+ from native Mac OS X
    • Required for Time Machine or Carbon Copy Cloner backups of Mac internal hard drive.
    • To Read/Write HFS+ from Windows, Install MacDrive
    • To Read HFS+ (but not Write) from Windows, Install HFSExplorer
    • Maximum file size: 8EiB
    • Maximum volume size: 8EiB
    • Maximum files per volume: 4,294,967,295
    exFAT (FAT64)
    • Supported in Mac OS X only in 10.6.5 or later.
    • exFAT partitions created with OS X 10.6.5 are inaccessible from Windows 7
    • Not all Windows versions support exFAT. See disadvantages.
    • Does not support journaling
    • 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
    • Maximum files per volume: nearly unlimited
     
  3. HappyDude20 thread starter macrumors 68020

    HappyDude20

    Joined:
    Jul 13, 2008
    Location:
    Los Angeles, Ca
    #3
    So...

    None of the ones under Disk Utility will work?

    Perhaps MS-DOS (FAT)?
     

    Attached Files:

  4. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #4
    Did you read the section on NTFS? Also, if you read the section on HFS+, you'll see how it can be used by Windows.
     
  5. HappyDude20 thread starter macrumors 68020

    HappyDude20

    Joined:
    Jul 13, 2008
    Location:
    Los Angeles, Ca
    #5
    Ah, I see. It looked like jargon at first... I guess i'll have my dad download the free programs provided.

    Thank you so much. You've been a huge help.
     
  6. kuwisdelu macrumors 65816

    Joined:
    Jan 13, 2008
    #6
    If you want to both read and write from both OS X and Windows...

    If they're Windows 7, go with exFAT.

    If they're older, go with FAT32 (the MS-DOS one).
     
  7. GGJstudios macrumors Westmere

    GGJstudios

    Joined:
    May 16, 2008
    #7
    FAT32 has file size limitations. exFAT isn't as universally compatible, in case you want to use a drive with multiple computers. exFAT also doesn't support journaling, which can lead to corrupted drives. Read this. exFAT isn't a bad choice, but don't rule out NTFS. NTFS works fine with Mac and Windows.
     

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