Mention mb sdconnect c4, it seems that there’s a lot of different manufacturers and quality levels of multiplexer clones. Here’s the one I went with, however I didn’t bother with the HDD/software…
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Prepare 6 AA5 batteries according to Instruction for how to install MB SD C4 Batteries.
Note: Please do use brand new batteries with sufficient electricity; otherwise, you will fail to update the firmware.
Tested many solutions for SD connect c4 software – EPC/WIS shortcut (EPC 09.2014). After 8-10 minutes work NOT the shortcut, EWA net error 462 – expired.