I never tried install packs by use of USB, I only use YEM.
When look into the manuals, it seems like that YEM is essential even if use USB.
If I understand it correctly, the packs has to be imported to YEM where it's being extracted.
Then you must export it to the usb before continue import to Genos. The instrument info file is a key that also must be imported to YEM.
I think this is a part of the copyprotection system, and that it also will deny files copyed from other users.
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Cheers π₯
GJ
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"Success is not counted by how high you have climbed
but by how many you brought with you." (Wil Rose)