Select everything you want to export
Record
OSSI Recommended: Without exporting it you won't be able to have the OSSI (e.g. the symbols) after importing it.
Replay Not recommended: Will take a huge amount of disk space, but will save time when importing the scenario as you won't have to replay it again.
Light PDBs Useless without the OSSI. You will be able to download them again after the import if you still have an access to a PDB server.
User Data Recommended: It only contains the files you could have put in the user data directory (/Reven2/2.15.1/Scenarios/cve-2019-1347_peparsercrash_minimal_c529055b-3529-4fbb-b98e-cfba38f1dd69/UserData).
/Reven2/2.15.1/Scenarios/cve-2019-1347_peparsercrash_minimal_c529055b-3529-4fbb-b98e-cfba38f1dd69/UserData