I've got a Sandisk Extreme Pro 512 gig USB. I might have the spec wrong, because I lent it to a family member a year ago, and haven't got the damn thing back. It is bloody fast, unlike a lot of cheaper USB sticks I've used. It's the third one I've had though. The first one failed just out of warranty, so I bought another. That failed, but was in warranty.
But, I generally use external SSDs, as they do tend to be faster, and I have to have a bag for my work laptop anyway, so don't really have a requirement for pocket size storage. I use the Samsung T range of SSDS. A couple of T5s and a T7.
The T5s are good, but I bought the T7 because it was faster, had 2TB of storage and could optionally be encrypted, with a finger print reader for access control. I also have an iodd st400, which is a 2.5inch drive case that can take an SSD or HDD, but offers the advantage that it can emulate a USB CD/DVD/Blu Ray drive with ISOs, multiple hard drives (using VHDs) and apparently a USB floppy (using IMA files). The emulation happens on the device, so it appears as those devices to the PC (including in the firmware).
Anyhow, the T7 offered incredibly fast access in the gigs per second range on a USB C gen 3.2 connection, and finger print security.
One day, I was backing my T7 up, so I could reformat it. I put my hand near it, and could feel heat radiating from it, so I touched it, and burned the palm of my hand. There were no smart warnings. I unplugged the drive, and let it cool down. It didn't start up I sent it back to Samsung, who did replace it.
I got a new T7 back, but it's noticably slower than the old one. It still averages hundreds of meg per second, but not gigs..