Stock Sprint GN4 Marshmallow with last security update suddenly stopped being able to send my most recent pics. Email, Gmail, or message. Both SD card pics and internal memory screen pics. Very frustrating. I have plenty of space remaining. 50Gb of 128Gb SD card, 6 Gb of 32Gb internal. However, sometimes I notice RAM is 97% utilized. Fortunately my pics are still being uploaded to Dropbox. Any ideas? I will probably do a factory reset as it is probably time to clean up the GN4 again.