SCP-258 can be found at scpwiki.com and was written by:
About the Podcast
These are the audio files from the ongoing data redundancy program at the SCP Foundation. In order to continue to Secure, Contain, and Protect it was decided that we need to protect our data from known and unknown threats to other data storage methods. Reel to reel audio was the obvious choice, as all of this information is already kept in a digital format as text.