Nice easy Achievement that will come with time.
You can deconstruct unwanted items in your inventory by highlighting the item and holding the
I found that the fastest way to get this achievement was to add all unwanted items to junk using
, and then deconstructing all junk as you would with a single item.
I mainly deconstructed low level items as they had very little value and I had unlocked this achievement after approx 7 hours game time