Hi everyone, I just purchased a GX7 and have had it for a couple of days now. I really like this camera and it even has some better features compared to my GH3 like focus peaking. I'm off to Disney World tomorrow with it and looking forward to carrying this around with the 20mm 1.7. Anyway, the reason for my post is that I'm having a problem with a couple of cards when used in the GX7. The same cards work fine in the GH3. have 2 - 32 GB Lexar Professional 400x cards that I use in the GH3. When I use them in the GX7 (and after formatting in camera) it's been throwing random errors where it says the card is full (when there's really only a couple of photos on it). Plus it throws a "Write Error - Please check the card" after taking a shot. So, I inserted a 16 GB SanDisk Extreme Pro card in and I haven't encountered these errors (yet). With the SanDisk cards, the GX7 starts up quicky and stores the photos rather quickly after taking a shot. With the Lexar cards, the camera shows the card busy icon for a few seconds on startup. Then every few photos or so, it takes longer to store the shot to the card. This is when it shows the card error sometimes. The pins look the same on all cards with no dust or dirt on them that I can see. The GH3 has thrown this same error a few times (maybe once or twice a year) but the GX7 is doing it quite a bit with the Lexar cards. Not sure what to think. The fact the GX7 is throwing errors on both Lexar cards has be wondering if its the cards or the camera. I have a couple of more weeks in the return window to take the camera back. The cards are formatted in camera which I've done many times now. The GX7 was assembled in July 2014 and has firmware 1.3 already installed from the factory. If it was just one card causing this, I would obviously think the card is the problem. But with 2 of the same card doing this, I'm hoping it's not the camera. Has anyone else run into this issue? I need to determine if it's the camera and if so, I'll be returning it. Is the GX7 particularly sensitive to certain cards? Thanks for any help or advice!