Ending today, ADATA via Rakuten offers the ADATA SU800 256GB SATA III M.2 3D TLC NAND Internal SSD (pictured) for $44.99. Coupon code "CYBER20" cuts the price to $33.59. (You must be logged in to apply the coupon.) With free shipping, that's the lowest price we could find by $12. It features read speeds up to 560 MB/s, and write speeds up to 520 MB/s.
Also available is the ADATA 1TB USB 3.0 Waterproof/Dustproof/Shock-Resistant External Hard Drive for $45.99 before the above coupon, $36.79 after. With free shipping, that's the lowest price we could find by $12. It features an LED indicator and wrap-around USB cable.
Teaching can be tough, but the life of a K-12 educator depends a lot on where you live.