I usually store electric appliances by coiling up their cables. Unfortunately this causes the cable jacket and insulation to break long before any other part of the machine, rendering a perfectly fine appliance unusable.
Below are two recent examples. The break is always close to where the cable exits the hard-plastic casing of the appliance, and it usually appears within only a few years after I bought the product.
Cables of tools like electric drills seem to be made of another, more flexible material, and I haven't yet had one of them break, even after decades of use.
How can I prevent cables from breaking when I coil them?