Keep in mind that over USB cable (without a jail break) you are seeing a very tiny bit of the overall file system tree.
What is your goal?
Is it you want to install Traditional Chinese fonts?
Once upon a time, Kindles supported a "USE_ALT_FONTS" option.
Long time gone from the firmware.
That fonts from Amazon are signed.
There should be tools in the Wiki for handling the file packages.
Since you can not sign the font packages with Amazon's private key (they keep it in a safe at the Amazon headquarters), you will have to sign the font package with our private key(s).
But that just means you have to have our public key installed on the Kindle.
Which in turn requires a jail break.
Note:
You can download the 5.9.2 update package from Amazon -
You can download the current KindleTool from:
https://www.mobileread.com/forums/sh...d.php?t=225030
Use Kindletool to convert it to a *.tar.gz archive file -
Open it -
The file: rootfs.img will be just what you would expect from the name - the complete system image.
You can mount it on your linux system with the mount command, no arguments needed, your linux system mount command will recognize it.
(It had better, Kindles run the Amazon distribution of Linux.)