I thought I might be able to help because I own a 2TB Elements portable hd and a Sandisk reversible USB
stick but my Galaxy device it a tablet running android, not Windows. I also don't run Windows 10 on any other computer in the house.
You do mean one of these SanDisk devices?
boot error on memtest on this sandisk disk
I don't think it can be used as a boot device. I think it is to move data from 1 device to another.View attachment 43293