I just received the RMA to return my 256 MB SanDisk Cruzer Mini, after it stopped working. In my case I could not read or write to it and when I checked the properties, where you normally have a file system of FAT32 or NTFS, mine read, NONE !
I will say however that SanDisk as a company was great. They sent me link to print out a FedEx lable and ship the defective unit back, at their expense
I work for a company that sells custom computer HW and SW, but we often are impact by the third party components that we use. Case in point we received a bad batch (like 1000's) of 146GB hard drives from one of the largest, most reputible drive manufactures in the world - (drive spindle issues). Impact us real bad, and made us look like we sold garbage, but we had no control over it. Maybe the same thing with the SanDisk Mini's