SD card memory issue

My camera's SD card insisted that it was out of memory despite not having any pictures on it.

Solved by reformatting the card (can be done on the camera).

Samsung S3 Screenshot

Press home button, then power button immediately after, and hold for a short period of time. A screenshot animation will occur.

source: http://droidlessons.com/how-to-take-a-screenshot-on-the-samsung-galaxy-s3-free-no-app-required/