As a reminder, USB NAND is some of the cheapest made by the industry. There are good, better and best brands but in the end, it's really not designed for extended I/O. This has been discussed many times in several prior threads. A more reliable, longer term alternative, which will perform better and last longer, is to: a) buy a UGREEN USB SSD enclosure (see threads) and lower cost smaller SATA SSD (or use an older one you have laying around) to take this workload.
https://www.snbforums.com/threads/m...at-is-reliable-brand.78503/page-2#post-759156
https://www.snbforums.com/threads/m...at-is-reliable-brand.78503/page-2#post-759156