Extremely slow USB to USB transfer

[mk01]

if there are no error on fdisks output then no.

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put the redirect at the end of the line after "done", or keep where it is but put >> instead. otherwise the log will be truncated (recreated fresh) on each round of dmesg.

cmdline.txt is at /boot and hold "kernel command line parameters". it is one line, doesn't matter order of all options. just be sure put space before and after.

mk