I just inserted a new 8GB memory card but it tells me ''OUT OF MEMORY'' I tried to format it but still gives me the same message. Why is that and what can I do about it please?

The memory card you are trying to use in the camera is not supported. This camera is an older technology that can not recognize the large 8 GB memory capacity of the card. In fact, the largest approved card your camera will recognize is 1 GB.

The list of approved memory cards was obtained from the Nikon Site directly, and pasted below for your convenience.

Nikon has tested the following cards and approved their use in the Coolpix 5700:

CompactFlash memory cards:
SanDisk SDCFB series 16 MB, 32 MB, 48 MB, 64 MB, 96 MB, and 128 MB
Lexar Media 4× USB series 8 MB, 16 MB, 32 MB, 48 MB, 64 MB, and 80 MB
Lexar Media 8× USB series 8 MB, 16 MB, 32 MB, 48 MB, 64 MB, and 80 MB
Lexar Media 10× USB series 128 MB and 160 MB
Lexar Media 40x USB WA series 256 MB*
Microtech International Digital Flash Film 1GB*
Delkin eFilm 650MB Pro*
Ritz Big Print 8x 256MB* (Edge Code 0E1B)

Microdrive cards:
DSCM-10512 512 MB
DSCM-11000 1 GB

Please rate this reply if it helped you out. Good luck!