Not sure what the Content ID/GUID is referencing/related to? (from an error message or notice a very large file in content repo directory you'd like to learn more about)

There's a handy zman command that can be run from any primary server,

zman can <GUID>

zman can ede99ff7b036137acd0a30816f7b85cf

example:

# zman can ede99ff7b036137acd0a30816f7b85cf

Username:administrator
Password:******

GUID | Name | Version
---------------------------------+-------------------------------------------------+--------
9d2f534d0d050c822e39a88c2a5c3ab0 | OES2018-SP3-Updates-bundle | sandbox
e98668b94ea7d993791506f047ce7fa5 | patch-oes2018-SP3-2021-24-Update 1 OES 2018 SP3 | sandbox