Which USB flash to choose for 24x7 work?

Question

Iron

There is a home nettop with linux on board. The system is installed on raid1 of two flash drives. The problem is that they die with a frequency of about once a year. I can not estimate the load, but it is not very large. Active logs/database moved to hdd. I use flash drives because there is only one compartment for a disk, I can’t make a mirror on the hdd.
The volume is from 16Gb, but more is not very necessary. Usb 3.0 is desirable, but not essential.
Already tried:
Kingston DataTraveler SE9 8GB usb2 (or completely similar 3-4 years ago, I don’t remember the exact model) - they lived for quite a long time, about a year.
SanDisk Cruzer Fit 16Gb usb2 - die very quickly (only 4 flash drives changed in a year) +
Silicon Power Marvel M01 get very hot16Gb usb3 - live for a year and a half, one recently completely flew out, the second one started to fail almost immediately after that, I think it will last no more than a couple of weeks. They are heated less than the others (somewhere around 40-45 degrees), thanks to the large metal case.
As an option, I consider cheap ssds of the minimum volume from somewhere in China. But trust in them is not enough, flash drives can be changed / handed over at least under warranty. In Russia, disks <=32Gb are somehow not very dense.
Please advise usb flash for 24x7 operation who has real experience with specific models.

Answer 1

I use flash drives because there is only one compartment for a disk, I can’t make mirrors on hdd.

Well, don't tell! Who wants - he seeks and finds!
1. Press
2. USB-flash (stick): https://ru.sandisk.com/home/usb-flash/extreme-usb

Answer 2

The meaning of using flash drives is not entirely clear. Why can't use USB HDD?