Thanks! To bother less, I unpacked what I needed

The entire content of the extracted batch in the file below. In / var / www / you can see what you need.
The filesystem on which it is saved is squashfs, and here it is not surprising. In the largest file, after a quick study, the frame values are almost at the beginning. They coincide with what we see and what we have come to. I haven't explored yet, I'm curious how they read from this USB. Moving on, it's not a problem, even maybe it will upload all this soft to another tplink and make it a server like you noticed.
Of course there is one "but". When registering the device on the website, you must enter the serial number of the device and it cannot be paired with the official website.
While browsing the files, I saw sections related to the unit upgrade. This is another thing to review

EDIT:
After a quick look at the files, you can see more information about the update in the config.py and regSoftUpdater.py, but it looks like
the update is not FTP, but HTTPS.