The fastest portable SSD I've used is also the smallest (and it's not even close)

Samsung's T9 SSD offers up to 4TB of storage with transfer speeds of up to 20Gbps - in an ultraportable form factor.

Amazon's Fire tablets are slow, but you can give them a little pep with a few simple tweaks

We tested this on a 128GB SanDisk A2 microSD card (A2 cards are supposed to be the best for apps) with a 7th-generation Fire ...