USB Hard Drive disconnects while writing files

I’m using Seagate Expansion drives for backups, and sometimes one will “disconnect” from the USB 3.0 port while writing files to it. And of course, I get a corrupted directory. Today I did some searching for a solution, and found it - ***don’t use a USB 3.0 extension cable! ***I copied a directory of about 150 GiB without the extension cable, and got, on average, 100MiB/s data rate. This problem has been driving me crazy for quite a while, now I’m happy. Lesson learned.