I am trying to install Windows 7 using the Boot Camp Assistant. I have downloaded the ISO, however I don't have a CD drive as its a MacBook Air and all my USB drives are too small. I am trying to install it using an SD Card as I read that they are handled in the same way as USB drives, however I can't find a way to get the assistant to recognise the SD card. Can any one help?
You can't do that as neither, OSX nor W7/W8 support booting from an SD card.
Get a simple usb-sd card adapter (not a multi card reader) and that'll work. In fact its what i used a micro-sd card in a usb adapter with an old 8gb card.
I'm currently installing Windows 7 from an 16 GB SD card. From a Windows computer, I prepared the SD card with WinToFlash and the ISO of Windows 7, and when it was done I mounted the SD card with a multi card reader, and Boot Camp read it!
This is partially inaccurate. You can actually install OS X on a SD card according to Apple's support documents. However, on Windows you can't.
Can I install Mac OS X on an SD storage device and use it as a startup volume?
Yes. Change the default partition table to GUID using Disk Utility, and format the card to use the Mac OS Extended file format to do so.
You can boot from a SD card — I've booted Windows 7 and Windows 8 from a SD card.
You need to find a program that will mount the image file onto the SD card and make sure you format Properly you can find out more information by just going on Google.