Is this legit or fake?

Bought few of this from Authorised Electronics Reseller, but I doubt the authenticity as I am not familiar with this old packaging.

Have you checked our knowledge base articles?
( Get Support for Your SSDs and Flash Products | Sandisk )

Try this one.

Have you opened a Support Case?
If not, contact SanDisk Technical Support for assistance.
( Contact Support | Sandisk )