I brought up the Samsung M.2 SSD just above. Today, an article that compares the various Samsung M.2 models for performance, lifetime, prices:



Samsung M.2 SSD Review

The article linked above by SkateZilla has more detail regarding the various electronic interfaces for the M.2 form factor. To repeat above cautions: The M.2 designation is slightly misleading because all M.2 SSD are not alike electronically; and, one has to be sure the M.2 they are picking actually works in their hardware for their purpose.