Originally Posted by dfkt
The speed classes don't matter at all if you use the SD cards in the Clip+. Even class 2 is faster than the internal transfer speed of the Clip. Anything will work fine, and a class 6 card would only make sense if you use a fast dedicated card reader for filling the card.
... or even a slow
dedicated card reader is likely to reap the benefits of a card faster than class 2. I wonder though, has anyone done benchmarks about database refresh speeds using different speed rated cards? Those can get kind of lengthy with several gigs of music.