Just as an FYI- Cross-save does not merge accounts in any way. You will either have your Steam characters, progress, and gear, be available to play. Or you’ll have you PSN characters, progress, and gear. You cannot combine items from your PSN account into your Steam account. It sounds like you want to use your Steam characters only, and just take some items from your PSN account, and that is not possible. Please take this information into account when considering what to do with your cross-save setup, as it cannot accomplish what you are hoping for.