Camera software update
This is the procedure I had to do to update the camera software
Remove 256gb card
Use 32gb card to load update file
Change name to INNOVVC5.bin
password When updated 12345678
Replace 256 card
To see this working, head to your live site.
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A also decided to use a different card to my normal recording card, 32gb the same as you.
Bit of a faf but it worked, not sure why it can't be updated via the app but there you go.
Please check again the bin file name, it should be the C5/K2.bin.
No C5(1)/(2).