Right now the law says that a service provider must take down or block access to the material. Taking down only links (whether they're HTTP links, or pointers i

Right now the law says that a service provider must take down or block access to the material. Taking down only links (whether they're HTTP links, or pointers in a software app, etc) pointing to the material does not meet that requirement -- the material is still there, and it's still accessible through the other links. So while it would be sensible to only remove the one link that you were notified of, if there are others, then by not taking them all down the service provider does not gain the safe harbor protection of the DMCA and remains liable for copyright infringement. Right now, as a non-lawyer reading the DMCA, it looks to me like any storage service that dedupes files is required to remove the file (from everyone's account) when any link to that file is reported, even if the other accounts have permission to store that file.