The days of storing photos, letters and other correspondence in a keepsake box are over. Now, everything is online. But what happens to those assets when the account holder is gone? Who, if anyone, currently has the authority to access them? Mike Avitzur sits down with Andy Rothstein of Goulston & Storrs and Joe Bierwirth of Hemenway & Barnes -- co-chairs of the Boston Bar's Trusts & Estates Section -- to find out.