Dear Hardeep,
I am glad to tell you that connections can be done through SPI and I am sending you Few Links.
1. Link for Pin Connection of interfacing to your circuit.
http://www.labbookpages.co.uk/electronics/avrs/sdCards.html
2.Link for General purpose SD Card Datasheet.
http://www.cypress.com/?docID=9706
3.Link For standard Micro SD Card Datasheet.
http://www.pqi.com.tw/upload/download/AE56-xxxx%281%29.pdf
Refer it and connect it .
it will work.
ok.