3 ResponseSpinal | 21/05/2007 | See all Spinal's reviews (1)Top 100 Electronics Reviewer SDHC is a different format to SD. While a SDHC reader can read SD cards, a SD reader cannot read SDHC cards.Hence, the PS3/PSP wont read these - they are old and outdated devices now. These are used mainly by newer mp3 players.If you plan on using SDHC for photography... one word; don't. SDHC has three standards, class2,4 and 6 ; which transfer 2, 4 and 6MB/s respectively.Good old SD transfer roughly 20MB/s if you get a 133x card (like the Veho 133x or SanDisk Ultra III) - which is almost 3 times faster than the fastest SDHC. Speed is of essence in photography - its what dictactes how soon you can take that next picture!