De or het startdiskette?

The correct Dutch article is:

de startdiskette

Rule Words ending in -te: usually de. See the rule

How to use startdiskette

the startdiskettede startdiskette
this startdiskettedeze startdiskette
that startdiskettedie startdiskette
our startdisketteonze startdiskette
your startdiskettejouw startdiskette
every startdisketteelke startdiskette
which startdiskette?welke startdiskette?
a big startdiskette / the big startdisketteeen grote startdiskette, de grote startdiskette