Select everything you want to export
Record
OSSI (You must replay feature OSSI before exporting it) Recommended: Without exporting it you won't be able to have the OSSI (e.g. the symbols) after importing it.
Replay (You must replay at least one resource before exporting it) 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 (You must replay feature OSSI before exporting it) 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 (/Reven2/2.18.4/Scenarios/mine_af82f7c6-e9d5-4556-9529-9a12cd83ad26/UserData).
/Reven2/2.18.4/Scenarios/mine_af82f7c6-e9d5-4556-9529-9a12cd83ad26/UserData