Pictures can be lots of different sizes.
Not many, but it depends on the quality and size of the pictures. The lower the quality and size the more pictures you can take.
Depends on the size and resolution of the pictures.
Depends on the size of the pictures
Image > Resize Enter size.
It depends on the size of the pictures
Depends on the size of the pictures
It depends on the size of the pictures. It can hold over a hundred pictures if the pictures are smaller than 150 kb. A 100kb picture size: 550 x 349 - 100k - jpg
depends on much memory is on the memory stick and the size of the pictures.
The size of a small jelly bean!
From Image > Image Size you can resize picture size to its half.
There are many tools for such purpose. But, photoshop has been a friend of mine since a long time, you can create/change pictures with any size you want.
~12.000 raw files ~26.000 jpeg files