You don't have to do anything. Whoever posted the data probably let others know where to find it. If you found, it most likely others have found it also and government agencies are already aware of it. Maybe a non-emergency call to a local police station may be appropriate. Forwarding links to the FBI, White House or another government agency may lead to conversations you don't want to have.
On the other hand
How would you know if the information really is secret data. How would you know if the information really is correct or true. Anything can be posted on the internet and you can'r believe everything you read on the internet.
Authorized cleared U.S. personnel can hand-carry classified information when they are traveling for official government business and have the appropriate clearance level and need-to-know for the information being transported. The classified material should be properly safeguarded and protected during the transport.
True
Facility Security Officer (FSO)
It helps prevent people from gaining access to information they're not cleared to access. The Secret Internet Protocol Routing Network (SIPRNET) contains classified information. Wires for the SIPRNET are marked so don't even think about touching them, let alone accessing the network, without proper clearance. The Non-classified Internet Protocol Routing Network (NIPRNET) is roughly equivalent to your home network in terms of security; only non-classified information should exist on the network.
Non Sensitive information cleared for public release
When information is spilled from a higher classification level to a lower classification level in the government, it is considered a security breach. This can compromise national security by exposing sensitive information to individuals who are not cleared to access that level of classified information. It can lead to investigations, legal consequences, and efforts to mitigate the damage.
Yes, I would have to report a data spill
Yes, to ensure none of the information is classified
Unclassified information does not need to be cleared for release.
Yes or true
True
All cleared DoD civilian, military, and contractor Personnel who generate or create classified material from authorized classified sources.