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  1. #1


    Member Since
    Mar 31, 2014
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    Error code 50 whilst copying files
    Using OS Mavericks 10.9.3 I wish to copy files from my hard drive to my NAS drive. If the file is large then the above code error code is raised. It's okay if I transfer small files at a a time. It works fine using my Windows 7 netbook so it is a MAC issue. Any ideas?
    Thanks

  2. #2

    chscag's Avatar
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    How are you copying the files? Error 50 denotes that the file or data is corrupt. (CRC errors) This occurs more often with large files because when the data moves it may not be properly buffered. We have no idea how you're setup for file transfer?

  3. #3


    Member Since
    Mar 31, 2014
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    Thanks for the reply,
    The files are on a portable hard drive and I was using the the standard method of drag and drop into my NAS drive (hard wired) when I got the error code 50 up. I then copied the files to the MAC - no problems and then tried to drag and drop from the MAC into the NAS drive (again hard wired) - error code 50 again. I tried plugging the portable drive into my windows 7 machine and was then able to drag and drop into the NAS drive okay (hard wired). I'm not aware of any corruption issues and I only manage to transfer a couple of files before error code 50 comes up. I've tried various folders all with the same result. The files are standard WAV, JPEG etc so they should not be a problem. It is definitely a MAC issue.
    Hope this is of use,

  4. #4

    IWT's Avatar
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    Just a thought, may not be relevant; but how is your NAS formatted? I only ask because if it is formatted MS DOS (Fat), then there is, I believe, a size limit on files that can be transferred. Whereas a drive formatted Mac OS Extended (Journaled) has no such limits.

    Ian

  5. #5


    Member Since
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    Ian,
    Thanks for the suggestion, I do not know the typo of formatting but the windows machine transferred them easily so I do not think that is the issue.

    Jim

  6. #6

    IWT's Avatar
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    Jim

    That is sort of what I was getting at. Windows does not have a problem transferring files to a MS DOS (Fat) formatted disc, but I believe that Macs do with a size limit.

    I don't want to mislead you and others with more experience can comment.

    You can, however, determine the format of your NAS disk by mounting it to the Mac & using Disc Utility (DU). Open DU with the NAS attached. DU shows all discs. Click on your NAS & from the top menu bar, choose Erase. Don't worry, choosing Erase merely opens up another window and this will show you the format. Then close DU.

    Ian

  7. #7

    Slydude's Avatar
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    Fat 32 formatted disks have a size limit such that no single file can be larger than 4GB. If I remember correctly the same limit applies regardless of whether the machine in question is a Mac or PC.

    There's been a lot written about that error on the web but I can't detect a specific pattern. I got the error recently because the drive I was copying to had some directory structure issues.
    "Got Time to breathe. You got time for music." Denver Pyle as Briscoe Darling

  8. #8


    Member Since
    Mar 31, 2014
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    Thanks for the replies guys, I will look into it.

    Jim

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