Strontium 8GB MicroSDHC Memory Card (Class 6) , Rs 111 From Amazon
http://www.amazon.in/gp/product/B00O54VXTY?ref_=gb1h_tit_t-1_0247_0bf47ee1%26smid=A14UQ4H17XUX90

About Product:-
Supports SD system specification version 2.0
Supports SD SPI mode
Card capacity of non-secure area, secure area supports specifications
Convertible to full SD card size with an adapter (optional)
Guarantees minimum data transmission of 6MB/s
Default mode : variable clock rate 0-25MHz, up to 6MB/sec interface speed
High-speed mode : variable clock rate 0-50MHz, up to 10MB/sec interface speed