Samsung 4000 Series User Manual page 150

The USB function might not work properly with unlicensed multimedia files.
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Read this information before using
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MTP (Media Transfer Protocol) is not supported.
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The file system supports FAT16, FAT32 and NTFS.
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Certain types of USB Digital camera and audio devices may not be compatible
with this TV.
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My Contents
is a Mass Storage Class Bulk-Only Transport device. Examples of MSC
◀
are Thumb drives, Flash Card Readers and USB HDD (USB HUB are not
supported). Devices should be connected directly to the TV's USB port.
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Before connecting your device to the TV, please back up your files to prevent
them from damage or loss of data. SAMSUNG is not responsible for any data
file damage or data loss.
My Contents
only supports USB Mass Storage Class (MSC) devices. MSC
with a USB device:
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