I have owned my condominium for over 15 years in Boston. I just discovered through the research of another unit owner that I own a storage unit that is a separate room on the floor that I live on. (The storage unit was granted as a permanent exclusive easement prior to my purchase of my condo, and the Deed was filed with the Registry of Deeds in Massachusetts.) I have notified (via a telephone conversation) the owner of another unit on my floor that has the key to this locked storage room that I have proof of ownership, and requested him to vacate the storage room. He has not disputed my ownership, but is checking with his attorneys regarding this issue. His tenants have personal possessions stored in the room. What due process do I need to follow to gain access to this storage room?