Hello,
Please read this carefully if You are RIFF Box v2 user:

RIFF JTAG Manager 1.66
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- RIFFBOX2 support for new connection mode is added (for new Drivers)
- Due to new drivers Read/Write speeds via eMMC interface increased 10 times and more
- Read/Write speed is now shown in MB/s
- Firmware Update process adjusted for slow networks (Indonesia, Bangladesh, India . . .)


RIFF Box Firmware v1.42

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- RIFFBOX connection mode is optimized for better speed, it is no more the CDC.
The data transfer speeds are increased more than 10 times.
- Fixed bug in handling the erroneous situations during eMMC data read operations.


Read more here:
http://forum.gsmhosting.com/vbb/f634.../#post12435568