Make sure the device is turned off before attempting to disassemble it.

At the top portion of the memory card slot, use the small metal spudger to create separation between the back cover and the rest of the device.

The small metal spudger is only used to create separation between the back cover and the rest of the device, not to remove the back cover.

If possible, try to use a normal nylon spudger to separate the back cover, as it is much softer and less likely to mar/scratch the device.