WOW I GOT MY 8 gig and it WAS working.. but now its saying its unformatted.....

[sent17inel]

WOW I GOT MY 8 gig and it WAS working.. but now its saying its unformatted..... it works intermittently.... my phone will read the card fine sometimes and sometimes it wont read it at all and cause the phone to come to a totall halt.... im lost for ideas.... i dont want to format cuz then ill have to load everything i had all back on it and that could take litterally about 7 hours..... maybe more..... i know if i take it out and put it back in that it will eventually start to work but i want to know why it doesnt read it sometimes... i have a hunch that its a registry fix somewhere that has to do with a possible sdhc card powersaving mode or something.... maybe not enough amps are flowing to the card for it to save crucial information? anyone..... thoughts.....?