Insurance For Items In Storage - STX

Anyone on STX have insurance on items you have in a Sun Self Storage - Seven Flags Storage type storage bin? If so where did you get your policy?

In the states our renters insurance covered our belongings if they were at the house, in storage, or both. My wife recently passed away and I moved out of the house we were renting. Many our belongings are now in storage. Our renters insurance is up for renewal and I just learned it doesn't cover anything not at my place of residence. Yikes!