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Yes that is current FW
Calibre has 2 files in the root. the small one id's the device and does not usually change.
The large on is the one that Calibre creates and matches the OnDevice marks.
It functions as a ondevice speedup file.
If you delete this, Calibre will create it again, that takes time.
Then there is the Kobo database (this is the one Utilities updates on the second connect)
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