Careful there. F2FS has a notoriously weak FSCK (nearly useless) for recovering the file system in the event of failures. It's the type of filesystem truly intended for use on embedded systems with read-only storage or devices with a battery attached. Using it on a removable device is inviting trouble.

If you genuinely don't want ext4 for some reason, at least opt for btrfs, which has more developed user space tools.