Sandy is correct. Get either Sandisk or Kingston. I don't exactly understand why the concept of the switchable CF card was devised, so I can't tell you why anybody would want it. Just get a straight card and forget it. ----- Original Message ----- From: "Tataindi" <tataindi@xxxxxxxxxxxxx> To: <bookport@xxxxxxxxxxxxx> Sent: Wednesday, December 13, 2006 10:29 AM Subject: [bookport] Re: 4 gigs with a double 2-gb configuration? I never heard about this kind of configuration. Would you please explain what is the purpose to have a 4gb card that can become a 2gb card? I'm going to buy one for the BP, the biggest that the BP can handle, one of these that have life time warranty. Would you please advice me what is the best to buy?