S7 Memory Card Notification?

I've been using BB's SanDisk Pixtor Advanced 64GB for nearly a week and had no problems with spontaneous ejecting. I get the notification once on power up which I dismiss and that's the end of it. It doesn't really bother me that it does that for how often I turn my phone off. I did not format it in the phone. I opened the package, put in my computer, copied pics to it, stuck it in the phone, powered it on, and that's it. I do not have it set to save anything automatically to the card. I also connected the phone by USB to the PC and used Windows Media Player to sync music to the card volume. It put my files in the /Music folder. So far it is working fine.