MicroSD
Two years ago I bought a 64GB MicroSD card for $40 and considered it a good deal.
Last year I upgraded to a 128GB MicroSD card for the same device, for $30.
This year I upgraded that device's storage again, this time to 256GB, for $40.
So, given this pattern, I look forward to buying a 1TB MicroSD card in 2021 for $40.