The first step is to open the device in order to expose the storage chips.

In the case of an SSD, if you're lucky you may only have to remove the screws holding the lid on (ignoring warnings about voiding the warranty). Otherwise, and for other devices, look for any crack between two halves of the case which might give you a weak point you can work on. You may need a hammer or a dremel with a cutting disk.

When you get inside you will see a circuit board with components on one or both sides. The largest of these will be the memory chips, and may be mounted on both sides of the board. There will be one or more similar looking but smaller controller chips which you probably don't need to worry about.