Let me first state that I know how to physically remove the card from the S4 and where to put it in the S7. And also all of my content on the card is backed up on my PC. So would it be safe to just transfer the card as is? Or should I format the card first? And if so should I format the card on the S4 before I remove it or transfer it to the S7 and format it on the S7? Or does that matter? Thanks.