T Mobile S4 was running cm10.1. Phone prompted me to install cm10.2. So I did. Phone was stuck in a boot loop. I went into recovery and wiped cache, dalvik, and then factory reset. Once phone reboot, 10.2 was installed and the boot loops stopped. While trying to install gapps, I accidentally selected install zip from sideload (instead of sd card). I selected go back and no my SD Card won't mount. Tried reformatting the SD Card and then unmount and mount in the phone (Settings > Storage) but nothing is working. Please advise. Thank you ahead of time.