avoider03,

SanDisk part #SDSDRX3-4096-A21 is a FULL-SIZE SD card. Also, be advised that SanDisk has released no Extreme III-, IV-, or "Ducati-" series miniSD or microSD cards. (The Extreme series is only available in CF and SD format.)

The fastest miniSD and microSD cards are Ultra II/Premier, and these are only offered up to 2GB. Only standard microSDHC cards are available in 4GB and (now) 6GB.

These different series are speed grades, although the principal benefit of a 'fast' card is outside the device--unloading its contents to a PC with, say, a Fiirewire 800 reader. The world of flash memory cards is both confusing and full of pitfalls and gotchas. In addition, pricing is very unstable.

Still, the J&R deal is pretty good.

--BAM