I would like to know if we can move QSL Cards from H3 inbox to H4 inbox, and if so how can we do it.

That's not possible, 'cause 3 and 4 are different database- and server-systems (FTP-Section).

Also our own cards / templates we can use in HS4, but have to "transfer" them and set all the icons again into the template.

73 and good DX from Jörg :-)
JO31ok
Bochum / Germany

TNX for the info, Jorg. 73, Good DX Carlos (KP4CG)

You're welcome, Carlos.

73 and good DX from Jörg :-)
JO31ok
Bochum / Germany