I am running Windows Vista Home Premium (32 bit) and have downloaded Recuva to retrieve some photos that I erased from my 8 Gbyte SD chip which were taken with my Canon Powershot 570. I have taken about a dozen photos since I erased the files I want to recover. I access the SD chip using a USB adapter and can see the G: removable drive listed and can retrieve two photos on the drive that I took yesterday but the Program does not recognize the G: drive in the "Browse" search box. What should I do at this point to recover the erased photos?