My USB memory stick has had information wiped after insertion into Belkin N+ net

I recently bought a Belkin N+ router which has a USB slot for network data access.

Howvever, after inserting an 8Gb USB memory stick into the drive I found that the memory stick now appears not to be formatted....'would you like to format it now?'

I may have withdrawn the memory stick without 'safely removing the hardware'. Does anyone have any suggestions for retrieving the lost information on the memory stick?

Thanks,

Mal

Recuva is a free data recovery program.