I think this ruling, and others it foreshadows, points to a need to amend the Constitution to ensure protections for personal property held by third parties on behalf of private citizens. At the time the 4th amendment was created, it was reasonable to assume that anything a person wanted to keep private would be safely secured by them in their own home. Times have changed. Now I keep my private financial "papers" in a system administered by a third party bank, my private medical "papers" in a system administered by a third party insurance company, and a lot of my other private effects in databases administered by third parties google, dropbox, etc.

Luckily the Framers foresaw that future changes would necessitate changes to our fundamental law so there is a process for the People to make such issues much less open to broad interpretation by the judicial branch.