Need way more info.
Need way more info.
Did you upgrade to 4.4 via the OTA (over the air) update?
If so I bet that your default saving location was your ExternalSD card previously and now the camera (and file browsers) cannot write to them.
There is a fix for rooted phones to enable SD card writing on NAE - 4.4.x. Read here
Or you can open the camera and change the default save location (to internal SD card) in the options.