There is a video in my USB device probably of the size (7.27 GB - 2.87 GB = 4.4 GB) enter image description here

But when I open it, I just see a 1 KB .cm0013 file

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If I connect the device to a TV, I can easily watch the video but no video is shown when the USB device is connected to my computer.


Hidden files are visible

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And there's no seperate partition in the device

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  • 1
    What is the file extension? Have you tried a different computer? How did you get the video file on the USB drive to begin with? May 12, 2019 at 19:27
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    I found a site that indicates the file is related to samsung tvs. en.filedict.com/cm0013-samsung-smart-tv-index-file-2047 I dont see a reference to why or how it may be related to hiding your larger file. I am sure they are related though. You did not mention what type of usb device. What type of device, just a thumb drive?
    – Ro Drop
    May 12, 2019 at 19:38
  • And the file is probably hidden by default. Have you tried with hidden files visible? However, seeing the file doesn't mean you can play it in a computer. If it is like suggested in the answer below a Samsung TV's proprietary format you probably can't reproduce it anywhere else.
    – user931000
    May 12, 2019 at 19:55
  • Is your first screenshot supposed to show that there is a "2.78 GB video in my USB devise"?
    – MrWhite
    May 12, 2019 at 21:39
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    @Scott I've edited my question. Tell me if more information is needed May 13, 2019 at 7:27

1 Answer 1


A .cm0013 file, created by select Samsung Smart TV is an index to the files located on external storage medium, such as a USB flash drive. The file is a pointer to the actual location on the disk of video data, similar to the .cda file on an audio CD, and is not the video data itself.

Look for other files on the USB drive, since clearly, something is taking up about 4.4 GB of the ~8 GTB on it. The drive might have hidden files, or even another partition, which you are not seeing in File Explorer. Turn on Show hidden files, folders and drives. Also try searching using DIR:

  • Press Windows, type cmd and press CtrlShiftEnter to get a CMD dialog as Administrator.

  • Type f: and Enter to move to the F: drive, assuming that is where the USB flash is shown.

  • Type dir \a:h and Enter to find hidden files.
  • Type dir \a:i and Enter to find un-indexed files.
  • Type dir \a:s and Enter to find system files.
  • Type dir \a:d and Enter to find other folders (directories).

If the video file still is hidden, it might be on another partition, which you can view in Disk Management: Press Windows, type diskmg in the Search box and select diskmgt.msc.

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  • Additional partitions cannot explain space marked as “used”.
    – Daniel B
    May 13, 2019 at 7:18
  • I've edited my question. May 13, 2019 at 7:27

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