External storage is required for

Limiting the requirement to only LS series appliances is incorrect because the ES-5060 and ES-7560 models also require external storage.

Not all ES series appliances require external storage - only the ES-5060 and ES-7560 models do, so stating 'all ES series' is too broad.

This answer omits the ES-5060, which also requires external storage, making it an incomplete and therefore incorrect statement of the requirement.

The LS (Log Server) series appliances lack sufficient onboard storage for the volume of raw log data they retain, making external storage a hard requirement. Within the ES (Event Server) series, the ES-5060 and ES-7560 are the models whose event storage and database requirements also exceed internal capacity, requiring external storage. Other ES series models have sufficient internal storage and are therefore excluded from this requirement.