De or het reservekopie?

The correct Dutch article is:

de reservekopie

How to use reservekopie

the reservekopiede reservekopie
this reservekopiedeze reservekopie
that reservekopiedie reservekopie
our reservekopieonze reservekopie
your reservekopiejouw reservekopie
every reservekopieelke reservekopie
which reservekopie?welke reservekopie?
a big reservekopie / the big reservekopieeen grote reservekopie, de grote reservekopie