The 32gig mod is the best thing I have done with this module. No more shifting about space (32 Gig is PLENTY for even a lot massive files) and exchanging no longer I need to dick about with having the module being to hand and connected to the Mac with a USB cable, just take the card. Not only that, transferring is MASSIVELY sped up. I was weary of the boot time being increased but I doesn't seem like it's even a second longer than with the 4gb internal card.