My SD microcard says it is a 32 GB card. (Can't wrap my brain around the fact that such a small card holds 32 gigs, but anyway..) I recorded a bunch of videos over the course of the last few days, which just accumulated on the card -- but nowhere near 32 gigs. Today while filming, the card said it was full. I looked at the card properties and it showed the entire card was full and only 3.68 gigs used. ????? I off-loaded the videos and deleted them from the card. I then looked at the card properties again and the card now reads 32 GB unused. Has anyone experienced premature filling up of the SD microcard? Thanks. BTW.. Checking my folder of downloaded video on my pc shows my entire library of videos and photos adds up to only about 3.6 gigs. Maybe I need to originally format the card via the DPI app before I ever use it?