Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
What agreement was made when you separated regarding storage?
In that case you should write her a formal letter giving him a date (say 28 days ahead) after which you will sell or dispose of the items and let her have the proceeds less any expenses
keep a record of what is sold and what the costs of disposal are and forward any balance promptly
Please ask if you need further details