Memory card class 4 or 10 and considering a Micro Card

Have a small nikon pocket camera and suddenly the memory cards works
sometimes and not others. It's now very unreliable. Someone told me that
they had heard to put it in the freezer. Are they pulling my leg?

Looking to buy a new SD card i see i can get an 8GB one class 4 and for a
bit more can buy a class 10. What difference would these different classes
make in such a camera? Any that i would notice?

Also I can buy a 8 GB * micro* SD card for the same price as the full size
SD card. I know i will have to buy a 'micro to full size adapter', but
thought this might be worth doing if in the future i wanted to put the micro
in a smart phone or something else. Is there any reasons why a micro card
might be disadvantaged in performance or reliability in relation to the full
size card? Thanks.

 

The class is actually the write speed, so a class 10 is
considerably faster than a class 4. Have a look at
http://www.memorycardzoo.com/blog/5/what-is-class-speed-rating/

The thing that really matters is how you use the camera. If you
are not going to use video recording (especially HD) then a class
4 will be plenty fast enough, but video will need the speed.

Also look carefully at the handbook or go browse the Nikon web
site to see what speed the camera needs. They will list
'approved' card manufacturers and it may be that your camera does
not like the one you are using. Personally (being a multiple
Nikon user) I stick to SanDisk Ultra or Extreme and even though
SanDisk are not listed I have never had any problem. Lexar is
another good make, but steer clear of makes such as PNY and that
other one that Expensive World sell that begins with i. Morrisons
are often one of the cheapest places for cards although you may
have to ask as they often do not have them on display. The last
time I bought a 4Gb card there I think it cost £6.99: EW had two
SanDisk 16Gb cards on offer a few weeks ago for - I think -
£19.99

I would avoid micro SD in an adapter as you have another
connector in the line which could cause problems. KISS principle
rules!

Putting a card in the freezer for 24 hours and then letting it
thaw out completely might help - it is somewhat anecdotal - but
what it will do is release any physical stresses with in the
mechanics of the construction. Conversely if there are any
slightly dodgy solder joints inside the thing it could make them
fail premerturely. You pays you money etc.......