What I got working is the following:
Compile lrzsz-0.12.20 (get it from here:
http://ohse.de/uwe/software/lrzsz.html) for M92 or take my readily compiled version from the attachment. Copy lrz and lsz to your M92 (either sd card or internal storage).
Connect to your M92 via USB serial console with root access, see
https://www.mobileread.com/forums/sho...89&postcount=5.
Use Zmodem to transfer files between your host and the M92. Unfortunately I don't know any way to do this without minicom. So I don't see a way to implement this into an automated script that - say - simply "pushes" a given file to the M92's internal storage or "pulls" a given file from M92.
"chat" would be an option, but I don't know how to combine it with zmodem...
By the way: doesn't g_file_storage.ko do, what we are looking for here?