What size of SD card can an HTC Desire accomodate? I have replaced my 2gb sd card with a 16gb one so i can store more music. Now I can't get the phone to play any music at all it says to make more space before opening app'. Any ideas?
It should be able to take up to 32 GB SDHC cards like almost all other devices.  Did you format the card?  Settings -&gt; SD card and phone storage -&gt; Unmount SD card and then Format SD card or similar, make sure to backup anything on it first if needed.