It says Serial Number: USBV1.00. If they mean USB version 1.00 then transfer is limited to 1.5 mbit max., that's about 190 kbytes per second, with error checking about 6 seconds per mbyte. 60 mbytes x 6 seconds =360 seconds = 6 minutes. Bingo! Now we need to know if the usb controller is in the rockchip itself (firmware could fix it if it is capable of 2.0 for real) or in an implemented old version usb controller chip on the player's board.
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