Originally Posted by Eris Ed
It can be the card you use in your phone if you wish. Formatting and partitioning the card only changes data - it doesn't change the 'structure' that makes the card a Gold Card.
But I think most people prefer to use a small capacity SD for a Gold card and keep it safe somewhere, then get a faster, larger capacity card to use in the phone.
Formatting doesn't affect it but I think
partitioning does (or can).