eLicence USB Key

I’m new to all this eLicence/Syncrosoft USB Key stuff, so I have a few questions.
1 - How many licences with the Steinberg USB Key Hold?.
2 - If I copy/move a licence from my Korg or Arturia key/keys to the Steinberg key, with the licence still be on the old key?.
3 - Do I have to use each key or just one with all the licences on it.
4 - Do differant firms/makers keys hold a differant number of licences/amount of memory?.

I do not know.

No. Licenses can only be present on one key at a time.

You can transfer all your licenses onto one key.

It would depend on the revision of the USB key used. Again, I do not know.

http://www.elicenser.net/en/latest_downloads.html

Watch the video, it may help.