This is simply not true, sadly. Copyright applies regardless of intentions or outcomes; it’s only in certain limited fields that some activities are somewhat exempted (i.e. backups). This is clearly not one of them.
“The less commercial the use, the smaller the portion used, the lesser the import of that portion of the work to the whole, and the lesser the effect on the market for or value of the work, the more likely it will be that fair use doctrine will apply.”