Those are going to be absolute bottom of the barrel garbage e-waste.
If you want a small flash drive, get a good one like this: Amazon.com: SAMSUNG MUF-256AB/AM FIT Plus 256GB - 300MB/s USB 3.1 Flash Drive, Gunmetal Gray : Electronics
If you really need something tiny for like hiding purposes, then get a decent microSD card and a separate USB reader. Go for a Samsung or SanDisk marketed as industrial (preferred) or endurance.