Olympus TG-850 Instruction Manual page 91

Increasing the number of pictures that can be taken
Either erase unwanted images, or connect the camera to a computer or other
device to save the images, and then erase the images in the internal memory or
card.
[Erase] (P. 16, 55), [Sel. Image], [All Erase], [Erase Group] (P. 55), [Memory Format]/
[Format] (P. 57)
EN 91