Also dang hunting around for a different SD card reader netted me a 4gb and a 16gb class 4 micro sdhc cards. my 8gb is class 10, which I assume means it's the fastest one I own.
the 1 and 2gb microsds tho don't have a class rating. so... probably slow as heck.
Nonetheless, more micro sds = more good, right?
@Nine class 10 is the fastest of the C speed ratings
More modern cards are rated as UHS-I, UHS-II, or UHS-III, represented by a 1, 2, or 3 inside of a U. (as well as a roman numeral I, II, or III next to the SD(HC/XC) logo) UHS-1 is the same speed as Class 10 and is the most common type you see now but I'm pretty sure faster cards do exist
@Nine also for the C ratings the number is the minimum number of megabytes per second you can write to the card, and for the U ratings multiply the number by 10 to get the minimum MB/s rating (U1 is 10MB/s, U2 is 20, etc)
@Felthry ...woah that's.... huh. actually really helpful to know as well. and surprisingly simple. niiice. :D so these old Class 4 rating ones are 4MB/s? I take it the really old non class rated Micro SD cards will be effectively Class 1 so 1MB/s maximum?
@Nine class 4 cards guarantee a minimum sequential write speed of 4 MB/s, but it could be higher; that's just what they guarantee
Also there is no C5 rating so a 5 MB/s card would still be marked C4