At the end of your lease, if you are not renewing for another year at the property, there are two possible situations.
In most cases, your Sharespace storage customers will have the same timeline as your lease, and they will move out prior to the end of your lease. You are not responsible for items left after the end of your lease.
In some cases, the customer may be storing for a period longer than your lease. In these cases, Sharespace will be responsible for the transition of the Host role to the next tenant.
In either case, you are not responsible for the items after your lease ends.