Q. Can I register more than one MFA device? Yes. First Coast recommends that you register more than one multifactor authentication (MFA) device. To register a second or third device, follow the steps you took in registering your initial MFA device. When logging into SPOT, you will select only one of these devices to receive your MFA passcode.
The microSD removable miniaturized Secure Digital flash memory cards were originally named T-Flash or TF, abbreviations of TransFlash. TransFlash and microSD cards are functionally identical allowing either to operate in devices made for the other.
In 2005 TransFlash was adapted by the SD Card Association. After the adoption, TransFlash changed name to microSD. source: is tf cards and sd cards are same. Comment below if you have any query regarding TF card and SD cards.