I would say get rid of more stuff but if you are a bit of a hoarder that prob wont help. I got rid of tonnes of stuff when hubby and i married and at the time it was painful but now i cant even remember what went. Check out the Kondo thread on here -makes sense but havent actually done it myself yet but will before i move.
Can you try a MAYBE pile and put some stuff there and if you dont miss it in a set time scale then find a new home (or charity).
I have lakeland storage bags bought 3 massive ones on offer - £60, they kept everything sealed for 8 months (req time) and everything came out smelling clean and freshly laundered, as it went in.
5 - I have a black smart coat, cream duffel, blue walking the kids about in the rain coat, smart cream that is too small, warm blue coat and loads of body warmers. Now my hubby would ask how many handbags does one woman need -now that is a question! He says one - ha the fool!
Just refreshed the kitchen,binned loads, apparently you dont need 12 wooden spoons and five bowls and multitudes of other things that all perform the same task and now kitchen actually has a spare cupboard -amazed! I also use more of my stuff more of the time as i can see it rather than have to dig it out.
Trying to implement a one in one out rule - clothes are next on my hit list.
I have decided the annoyance and aggravation that having too much stuff and not enough space is worse than chucking way things that i MAY one day need.
Eyes very large collection of high heels that dont really fit since putting on 3 stone, having 2 kids, developing sciatica and being forced to abandon heels. Just because i may one day need a fuchsia pink platform 3 inch strappy sandal is not enough reason to leave them in the attic unworn for the last 5 years. Unfortunately.
Sorry didnt actually help with the storage issue, my advice love it and use it or rehome it to someone who might need it ( to fill their storage)
Good luck