Originally Posted by HarryT
I don't believe there's any such beast as a "non HC" 4GB card. Above 2GB all SD cards are SDHC, to the best of my knowledge.
That's incorrect. Transcend has a 4GB non-SDHC card. THe 500 can read and write that up till 2GB.
If you put an SDHC-card in the 500, it won't be found.