Depends on how much you value portability vs performance.
If I plan to take a device anywhere, I don't want a cord, period. Then again I'm male and don't carry a sack or purse so there's that limitation. If traveling and I had a suitcase, it's less of an issue.
At the same time, USB flash drives with good performance (integral SSD controller and enough parallel lanes/chips to do so), tend to get pricey per capacity, and the amount of data out there to store just keeps growing, so it would be hard for me to accept getting a 512GB flash drive when the other alternatives are 4X the capacity, unless you also have other storage like HDDs and this is just to sneakernet data around.
Anyway I never found a need for an external SSD. Almost all use cases I have, are better met by a fast USB flash drive, or client and server side internal or USB external 3.5" HDDs.
It does look like a good choice if you decide to get a thumb drive.