How are they failing on you? Do they physically break or do they not work when plugged in and give errors?

If it’s the latter, it’s typically because memory sticks have inferior controllers comparatively to better quality SSD’s, and that said, not all are made equally in terms of quality NAND (memory) and controllers

Long story short, Samsung stuff is a safe bet

If you’re looking for a tough memory stick check out the Samsung BAR usb

Dell; I work in an Enterprise IT environment and although you’ll likely end up with a different model than the ones we use, their warranty is worth it

1 year standard warranty gets you parts AND labor with a tech that will come on site to do the work (your home or wherever you happen to be) if there is an issue

This is huge if you need to mitigate down time