I have bought a usb connector to connect my flash drives with my phone. Every time i connect the connector i get the message USB connector connected but right after connecting the usb i get SD Card is Damaged. Try Reformatting it.
I used to have Omega rom and it was working fine for a couble of weeks but suddenly the message came up again so i flashed the official 4.3 android for S3. The problem still persists... FYI the phone is rooted and with stock rom and kernel.