And use the duplicateing glitch and if you do not know that look it up on you tube and then get like 40 lockpicks open up the case get the one grand soul gem with nothing in it and use the duplicateing glitch on the one and get 5 or any amount so good luck! The Capacity of a soul gem must be greater than or equal to the Strength of a soul confined within that soul gem. This is actually briefly mentioned during the main quest.
Soul Lock is a passive and cannot be slotted in your ability bar.
Another way to easily fill soul gems is by getting the ConjurationskillSoul Stealer, which automatically makes bound weapons cast Soul … When filled with the best applicable soul, their capacity utilized in enchanting is 1600. Keep in mind, you can fill larger soul gems with smaller souls. Take your favorite fandoms with you and never miss a beat. The grand soul gem is the largest soul gem, and can carry any size of white soul.
A humanoid soul (ie, one of the main races or a Dremora) will always be Grand when trapped in a black gem. And to know if its full it will say grand soul gem with 123 or 4 in your inventory when highlighted.