Sony NSZ-GT1 - Manual (Page 46)

compatibility list.
NSZ-GT1
Connection via a USB-hub is not supported.
USB devices must be less than 2TB.
The Internet TV can recognize Mass Storage Class devices (such as flash memory or HDD)
that are FAT-compatible.
When playing a WMV file, you cannot perform the following operations.
Fast rewind/Fast forward
Resume
Skip using the progress bar
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NSZ-GT1 46