After two weeks of frustration and about a dozen e-mails to SanDisk, I finally received an honest reply from them. I was unable to get the password option to work on my flash drive. SD gave me several time-consuming suggestions (all assuming it was my iMAC at fault, not their drive), then today I received an e-mail telling me that their drive doesn't work on 10.6. All previous OS, but not Snow Leopard. Thought I'd pass this on to anyone here that's interested.