How to find and work on histories shared with you
To find histories shared with me:
Log into your account.
Select User, in the drop-down menu, select Histories shared with me.
To work with shared histories:
Import the History into your account via copying it to work with it.
Unshare Histories that you no longer want shared with you or that you have already made a copy of.
Note: Shared Histories (when copied into your account or not) do count in portion toward your total account data quota usage. More details on histories shared concerning account quota usage can be found in this link.