How can I rename a removable SD card, or create a folder on it. Permission Denied I am not a programmer, I am a 'user'. I have bought a FonePad and added a 32GB SDHC card, naively thinking I could use it to store the maps I will need on a storage-hungry navigation software.

However, I find I cannot rename the device from Removable, I get the message 'Permission Denied'.  Same result when I try to create a subfolder. Same result if I try using a utility like SDCard Manager or Card Manager HD.

Coming from a Windows world, I am just completely lost.

Take SDCard Manager for example: when running it says that it has *Storage -- Modify or delete the contents of your SD card. I note that SD card is the 'built-in' device.
It sounds like you formatted the card using your computer, or another device. It seems like now your Android device doesn't have proper permissions to write to the card. You can fix this by formatting the card. If you don't want to format the card, just run this on Ubuntu or another linux based system:

sudo chmod -r o+w /path/to/sdcard


This will recursively give everyone permission to write to the card. If the card is empty, you probably just need to apply this to the root directory, with no recursion:

sudo chmod o+w /sdcard/root