Hi again. I have been looking through past threads and can't find an answer so far. How much space does a backup of the SP3 require? I am wanting to buy a micro sd to backup to and also save some movies and music. I only have about 12gb of stuff right now that I want to save so not sure if a 32gb is good or if I should go ahead and go for the 64gb. Also, looks like the Samsung Pro cards have 90mbs speed cards. Should I opt for that or are the 48mbs Sandisk and Samsung cards sufficient to watch HD movies from? As always, thanks for the great advice!