Kingston's XS2000 20Gbps USB SSD is affordable, tiny enough to get lost in your pocket, and available with up to 4TB of capacity.
Kingston XS1000 Portable External Pocket Size SSD USB 3.2 Gen 2
Kingston Announces Lightweight Portable SSD XS1000 - eTeknix
Kingston XS2000 1TB SSD Review, 2000 MB/S Speed
Kingston XS2000 review: Ultraportable SSD with blazing fast
Kingston Digital Announces Pocket-Sized XS2000 Portable SSD
Kingston XS2000 2TB External SSD review
Kingston XS2000 Portable SSD Review
Review: Kingston XS2000 Portable SSD - Size isn't everything!
Kingston XS2000 Portable SSD review - Camera Jabber