MicroSD cards are tiny but slow; the M.2 storage sticks in your PC are blazing fast but bigger and fully enclosed. Now, a new type of SSD out of China could be the best of both worlds — and it’s already set to appear in two cutting-edge gaming portables.

Chinese storage manufacturer Biwin is calling it the “Mini SSD,” though another manufacturer refers to it as the “1517”; it measures just 15mm x 17mm x 1.4mm thick, smaller than a U.S. penny and just slightly larger than MicroSD. Despite that, it offers maximum sequential read speeds of 3,700 megabytes per second (or 3,400MB/s writes) over a PCIe 4x2 connection, and offers 512GB, 1TB and 2TB capacities.

I suspect this will go over about as well as Samsung’s UFS cards.

So, now we have yet another competing standard for removable storage.